feat(batch7): implement f2 reload orchestration and apply path

dotnet/src/ZB.MOM.NatsNet.Server/Config/ReloadOptions.cs

@@ -498,6 +498,12 @@ internal sealed class ClusterReloadOption : AuthReloadOption
     public override bool IsClusterPoolSizeOrAccountsChange()
         => _poolSizeChanged || _accsAdded.Length > 0 || _accsRemoved.Length > 0;
 
+    internal ClusterOpts? ClusterValue => _newValue as ClusterOpts;
+    internal bool PoolSizeChanged => _poolSizeChanged;
+    internal bool CompressChanged => _compressChanged;
+    internal IReadOnlyList<string> AccountsAdded => _accsAdded;
+    internal IReadOnlyList<string> AccountsRemoved => _accsRemoved;
+
     /// <summary>
     /// Computes pool/account deltas used by reload orchestration.
     /// Mirrors Go <c>clusterOption.diffPoolAndAccounts</c>.
@@ -715,6 +721,8 @@ internal sealed class JetStreamReloadOption : NoopReloadOption
     private readonly bool _newValue;
     public JetStreamReloadOption(bool newValue) => _newValue = newValue;
 
+    internal bool Value => _newValue;
+
     public override bool IsJetStreamChange() => true;
     public override bool IsStatszChange()    => true;