Start per-tenant subscription agents whose starting position seeds their progress (UseTenantPartitionedEvents) - #5700

/home/runner/work/marten/marten/src/Marten/Linq/Parsing/JoinSelectParser.cs(492,32): warning CS8632: The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]

/home/runner/work/marten/marten/src/Marten/Linq/Parsing/GroupBySelectParser.cs(641,46): warning CS8632: The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]

/home/runner/work/marten/marten/src/Marten/Linq/Parsing/GroupBySelectParser.cs(641,33): warning CS8632: The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]

/home/runner/work/marten/marten/src/Marten/Linq/Parsing/GroupBySelectParser.cs(656,50): warning CS8632: The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]

/home/runner/work/marten/marten/src/Marten/Linq/Parsing/GroupBySelectParser.cs(649,20): warning CS8632: The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]

/home/runner/work/marten/marten/src/Marten/Linq/Parsing/GroupBySelectParser.cs(648,20): warning CS8632: The annotation for nullable reference types should only be used in code within a '#nullable' annotations context. [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]

/home/runner/work/marten/marten/src/Marten/Linq/Includes/IncludePlan.cs(39,32): warning CS8766: Nullability of reference types in return type of 'Expression? IncludePlan<T>.Where.get' doesn't match implicitly implemented member 'Expression IIncludePlan.Where.get' (possibly because of nullability attributes). [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]

/home/runner/work/marten/marten/src/Marten/Patching/PatchOperation.cs(180,26): warning CS0108: 'PatchOperation.Role()' hides inherited member 'StatementOperation.Role()'. Use the new keyword if hiding was intended. [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]

/home/runner/work/marten/marten/src/Marten/IDocumentStore.cs(290,19): warning CS0108: 'IDocumentStore.QuerySession(string)' hides inherited member 'IDocumentSessionFactory<IDocumentSession, IQuerySession>.QuerySession(string)'. Use the new keyword if hiding was intended. [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]

/home/runner/work/marten/marten/src/Marten/IDocumentStore.cs(283,19): warning CS0108: 'IDocumentStore.QuerySession()' hides inherited member 'IDocumentSessionFactory<IDocumentSession, IQuerySession>.QuerySession()'. Use the new keyword if hiding was intended. [/home/runner/work/marten/marten/src/Marten/Marten.csproj::TargetFramework=net10.0]