feat(jetstream): add mirror sync loop and source coordination with filtering (C9+C10)

src/NATS.Server/JetStream/StreamManager.cs

@@ -336,6 +336,8 @@ public sealed class StreamManager
                 Name = s.Name,
                 SubjectTransformPrefix = s.SubjectTransformPrefix,
                 SourceAccount = s.SourceAccount,
+                FilterSubject = s.FilterSubject,
+                DuplicateWindowMs = s.DuplicateWindowMs,
             })],
         };