Merge all changes

src/__Libraries/StellaOps.Replay.Core.Tests/FeedSnapshot/FeedSnapshotCoordinatorTests.cs

@@ -139,6 +139,7 @@ public sealed class FeedSnapshotCoordinatorTests
         var result = await coordinator.ValidateSnapshotAsync(snapshot.CompositeDigest);
 
         // Assert
+        Assert.NotNull(result);
         Assert.True(result.IsValid);
         Assert.Null(result.MissingSources);
         Assert.Null(result.DriftedSources);