Define experimental diagnostics IDs

[RussKie]

With dotnet/roslyn#68702 and dotnet/runtime#85444 we now have live experimental diagnostics (e.g., it's already surfaced in dotnet/aspnetcore#49297), however, we don't have any diagnostic IDs defined.

As per #4130 (comment), diagnostic IDs must be defined one per experimental feature. For example, generic math would use one ID that is applied to many APIs. The idea being that users can suppress usages on a per-feature level.

[RussKie]

@geeknoid @dpk83 assigning to you. Pull others as you see appropriate.

[RussKie]

FWIW, the latest Preview7 SDK is already breaking consumers. E.g., this build:

/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.TimeProvider.Testing/FakeTimeProvider.cs(36,9): error TBD: 'Microsoft.Extensions.Time.Testing.FakeTimeProvider.Start' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.TimeProvider.Testing/Microsoft.Extensions.TimeProvider.Testing.csproj::TargetFramework=net462]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.TimeProvider.Testing/FakeTimeProvider.cs(52,9): error TBD: 'Microsoft.Extensions.Time.Testing.FakeTimeProvider.Start' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.TimeProvider.Testing/Microsoft.Extensions.TimeProvider.Testing.csproj::TargetFramework=net462]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.TimeProvider.Testing/FakeTimeProvider.cs(36,9): error TBD: 'Microsoft.Extensions.Time.Testing.FakeTimeProvider.Start' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.TimeProvider.Testing/Microsoft.Extensions.TimeProvider.Testing.csproj::TargetFramework=net8.0]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.TimeProvider.Testing/FakeTimeProvider.cs(52,9): error TBD: 'Microsoft.Extensions.Time.Testing.FakeTimeProvider.Start' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.TimeProvider.Testing/Microsoft.Extensions.TimeProvider.Testing.csproj::TargetFramework=net8.0]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(35,16): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net462]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(56,16): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net462]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(70,103): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net462]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(104,16): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net462]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(82,144): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net462]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(73,35): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net462]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(96,36): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net462]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(119,67): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net462]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(119,145): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net462]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(35,16): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net8.0]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(56,16): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net8.0]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(70,103): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net8.0]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(104,16): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net8.0]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(82,144): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net8.0]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(73,35): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net8.0]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(96,36): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net8.0]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(119,67): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net8.0]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(119,145): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=net8.0]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.AsyncState/AsyncContext.cs(9,41): error TBD: 'Microsoft.Extensions.AsyncState.IAsyncLocalContext<T>' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.AsyncState/Microsoft.Extensions.AsyncState.csproj::TargetFramework=net462]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.AsyncState/AsyncStateExtensions.cs(30,41): error TBD: 'Microsoft.Extensions.AsyncState.IAsyncLocalContext<>' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.AsyncState/Microsoft.Extensions.AsyncState.csproj::TargetFramework=net462]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.TimeProvider.Testing/FakeTimeProvider.cs(36,9): error TBD: 'Microsoft.Extensions.Time.Testing.FakeTimeProvider.Start' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.TimeProvider.Testing/Microsoft.Extensions.TimeProvider.Testing.csproj::TargetFramework=netcoreapp3.1]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.TimeProvider.Testing/FakeTimeProvider.cs(52,9): error TBD: 'Microsoft.Extensions.Time.Testing.FakeTimeProvider.Start' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.TimeProvider.Testing/Microsoft.Extensions.TimeProvider.Testing.csproj::TargetFramework=netcoreapp3.1]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(35,16): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=netcoreapp3.1]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(56,16): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=netcoreapp3.1]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(70,103): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=netcoreapp3.1]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(104,16): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=netcoreapp3.1]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(82,144): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=netcoreapp3.1]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(73,35): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=netcoreapp3.1]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(96,36): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=netcoreapp3.1]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(119,67): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=netcoreapp3.1]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/ObjectPoolServiceCollectionExtensions.cs(119,145): error TBD: 'Microsoft.Extensions.ObjectPool.DependencyInjectionPoolOptions' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.ObjectPool.DependencyInjection/Microsoft.Extensions.ObjectPool.DependencyInjection.csproj::TargetFramework=netcoreapp3.1]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.Telemetry.Abstractions/Metering/MeteringExtensions.cs(23,60): error TBD: 'Microsoft.Extensions.Telemetry.Metering.Meter<>' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.Telemetry.Abstractions/Microsoft.Extensions.Telemetry.Abstractions.csproj::TargetFramework=net462]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.Telemetry.Abstractions/Metering/MeteringExtensions.cs(23,77): error TBD: 'Microsoft.Extensions.Telemetry.Metering.Meter<>' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.Telemetry.Abstractions/Microsoft.Extensions.Telemetry.Abstractions.csproj::TargetFramework=net462]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.Telemetry.Abstractions/Metering/MeteringExtensions.cs(23,60): error TBD: 'Microsoft.Extensions.Telemetry.Metering.Meter<>' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.Telemetry.Abstractions/Microsoft.Extensions.Telemetry.Abstractions.csproj::TargetFramework=netcoreapp3.1]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.Telemetry.Abstractions/Metering/MeteringExtensions.cs(23,77): error TBD: 'Microsoft.Extensions.Telemetry.Metering.Meter<>' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.Telemetry.Abstractions/Microsoft.Extensions.Telemetry.Abstractions.csproj::TargetFramework=netcoreapp3.1]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.Telemetry.Abstractions/Metering/MeteringExtensions.cs(23,60): error TBD: 'Microsoft.Extensions.Telemetry.Metering.Meter<>' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.Telemetry.Abstractions/Microsoft.Extensions.Telemetry.Abstractions.csproj::TargetFramework=net8.0]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.Telemetry.Abstractions/Metering/MeteringExtensions.cs(23,77): error TBD: 'Microsoft.Extensions.Telemetry.Metering.Meter<>' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.Telemetry.Abstractions/Microsoft.Extensions.Telemetry.Abstractions.csproj::TargetFramework=net8.0]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.AsyncState/AsyncContext.cs(9,41): error TBD: 'Microsoft.Extensions.AsyncState.IAsyncLocalContext<T>' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.AsyncState/Microsoft.Extensions.AsyncState.csproj::TargetFramework=netcoreapp3.1]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.AsyncState/AsyncStateExtensions.cs(30,41): error TBD: 'Microsoft.Extensions.AsyncState.IAsyncLocalContext<>' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.AsyncState/Microsoft.Extensions.AsyncState.csproj::TargetFramework=netcoreapp3.1]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.AsyncState/AsyncContext.cs(9,41): error TBD: 'Microsoft.Extensions.AsyncState.IAsyncLocalContext<T>' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.AsyncState/Microsoft.Extensions.AsyncState.csproj::TargetFramework=net8.0]
/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.AsyncState/AsyncStateExtensions.cs(30,41): error TBD: 'Microsoft.Extensions.AsyncState.IAsyncLocalContext<>' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/src/Libraries/Microsoft.Extensions.AsyncState/Microsoft.Extensions.AsyncState.csproj::TargetFramework=net8.0]
/mnt/vss/_work/1/s/test/Libraries/System.Cloud.DocumentDb.Abstractions.Tests/DatabaseOptionsTests.cs(47,21): error TBD: 'System.Cloud.DocumentDb.DatabaseOptions.OverrideSerialization' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/test/Libraries/System.Cloud.DocumentDb.Abstractions.Tests/System.Cloud.DocumentDb.Abstractions.Tests.csproj::TargetFramework=netcoreapp3.1]
/mnt/vss/_work/1/s/test/Libraries/System.Cloud.DocumentDb.Abstractions.Tests/DatabaseOptionsTests.cs(47,21): error TBD: 'System.Cloud.DocumentDb.DatabaseOptions.OverrideSerialization' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/test/Libraries/System.Cloud.DocumentDb.Abstractions.Tests/System.Cloud.DocumentDb.Abstractions.Tests.csproj::TargetFramework=net7.0]
/mnt/vss/_work/1/s/test/Libraries/System.Cloud.DocumentDb.Abstractions.Tests/DatabaseOptionsTests.cs(47,21): error TBD: 'System.Cloud.DocumentDb.DatabaseOptions.OverrideSerialization' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/test/Libraries/System.Cloud.DocumentDb.Abstractions.Tests/System.Cloud.DocumentDb.Abstractions.Tests.csproj::TargetFramework=net6.0]
/mnt/vss/_work/1/s/test/Libraries/System.Cloud.DocumentDb.Abstractions.Tests/DatabaseOptionsTests.cs(47,21): error TBD: 'System.Cloud.DocumentDb.DatabaseOptions.OverrideSerialization' is for evaluation purposes only and is subject to change or removal in future updates. (https://aka.ms/dotnet-extensions-warnings/TBD) [/mnt/vss/_work/1/s/test/Libraries/System.Cloud.DocumentDb.Abstractions.Tests/System.Cloud.DocumentDb.Abstractions.Tests.csproj::TargetFramework=net8.0]
    0 Warning(s)
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[RussKie]

@geeknoid the suggested way forward for this is as follows:

• We already have a forwarder: https://aka.ms/dotnet-extensions-warnings/{0}. For each ID we'll need to create an entry in aka.ms.
• The link can point to anywhere, the easiest (for now - or forever) would be point to a doc located in this repo. Something similar to https://github.com/dotnet/runtime/blob/main/docs/project/list-of-diagnostics.md.