feat(batch27): implement jetstream config validation and error tail

dotnet/src/ZB.MOM.NatsNet.Server/NatsServer.cs

@@ -254,6 +254,8 @@ public sealed partial class NatsServer : INatsServer
     private readonly ConcurrentDictionary<string, object?> _nodeToInfo = new(StringComparer.Ordinal);
     private readonly ConcurrentDictionary<string, object?> _raftNodes  = new(StringComparer.Ordinal);
     private          JetStream?            _jetStream;
+    private readonly Lock                  _resourceErrorLock = new();
+    private          DateTime              _resourceErrorLastUtc;
     private readonly Dictionary<string, string>  _routesToSelf          = [];
     private          INetResolver?               _routeResolver;
     private readonly ConcurrentDictionary<string, object?> _rateLimitLogging = new();