Fix SQLitePCLRaw vulnerability warnings in examples

[orange-dot]

Summary

• Pin SQLitePCLRaw.lib.e_sqlite3 to 3.50.3 in the SQLite-backed examples.
• Keep the existing Microsoft.Data.Sqlite and Akka.Persistence.Sql package versions unchanged.

Root cause

CodeQL autobuild restores the solution with warnings as errors. These example projects resolved vulnerable transitive SQLitePCLRaw.lib.e_sqlite3 versions, which triggered NU1903 for GHSA-2m69-gcr7-jv3q.

Validation

• dotnet restore src/examples/Akka.Persistence.Custom/Akka.Persistence.Custom.csproj
• dotnet restore src/examples/Akka.Persistence.Custom.Tests/Akka.Persistence.Custom.Tests.csproj
• dotnet restore src/examples/Cluster/ClusterSharding/ClusterSharding.Node/ClusterSharding.Node.csproj
• dotnet build -c Release --no-restore src/examples/Akka.Persistence.Custom/Akka.Persistence.Custom.csproj
• dotnet build -c Release --no-restore src/examples/Cluster/ClusterSharding/ClusterSharding.Node/ClusterSharding.Node.csproj
• confirmed project.assets.json resolves SQLitePCLRaw.lib.e_sqlite3/3.50.3 for the affected projects
• confirmed the pushed commit is GPG signed and GitHub verified

[Aaronontheweb]

Not sure this is the right fix, because SQLitePCLRaw.lib.e_sqlite 3.50.3 is an unlisted version probably for a good reason.

I dealt with this over the weekend on another Akka.NET-based project netclaw-dev/netclaw#1444 - just suppressed it for the time being, because there is an upstream fix on the way: dotnet/efcore#38402

[Aaronontheweb]

I appreciate you trying to fix this though!

[Aaronontheweb]

Whoops, didn't mean to close it lol

[orange-dot]

I will close it, no worries.