Eliminate PortTracker stub backlog by implementing Raft/file-store/stream/server/client/OCSP stubs and adding coverage. This makes all tracked stub features/tests executable and verified in the current porting phase.

dotnet/tests/ZB.MOM.NatsNet.Server.Tests/JetStream/WaitQueueTests.cs

@@ -0,0 +1,31 @@
+// Copyright 2012-2026 The NATS Authors
+// Licensed under the Apache License, Version 2.0
+
+using Shouldly;
+using ZB.MOM.NatsNet.Server;
+
+namespace ZB.MOM.NatsNet.Server.Tests.JetStream;
+
+public sealed class WaitQueueTests
+{
+    [Fact]
+    public void Add_Peek_Pop_IsFull_ShouldBehaveAsFifo()
+    {
+        var q = new WaitQueue();
+
+        q.Peek().ShouldBeNull();
+        q.Pop().ShouldBeNull();
+
+        q.Add(new WaitingRequest { Subject = "A", N = 1 });
+        q.Add(new WaitingRequest { Subject = "B", N = 2 });
+
+        q.Len.ShouldBe(2);
+        q.IsFull(2).ShouldBeTrue();
+        q.Peek()!.Subject.ShouldBe("A");
+
+        q.Pop()!.Subject.ShouldBe("A");
+        q.Pop()!.Subject.ShouldBe("B");
+        q.Len.ShouldBe(0);
+        q.IsFull(1).ShouldBeFalse();
+    }
+}