docs(src): add missing XML docs and strip tracking-ID comments

Sweep of 203 source files resolving CommentChecker findings: add
<summary>/<param>/<returns>/<inheritdoc> where missing, and remove
resolved task/issue tracking markers (Tests-NNN, Worker-NNN, Server-NNN,
Task N) from code comments. Comment/doc-only — no logic changes.
Server+Tests build clean under TreatWarningsAsErrors.

src/ZB.MOM.WW.MxGateway.Worker.Tests/Bootstrap/WorkerApplicationTests.cs

@@ -143,10 +143,7 @@ public sealed class WorkerApplicationTests
 
     private sealed class SucceedingPipeClient : IWorkerPipeClient
     {
-        /// <summary>Runs the worker pipe client successfully.</summary>
-        /// <param name="options">Worker options.</param>
-        /// <param name="cancellationToken">Cancellation token.</param>
-        /// <returns>Completed task.</returns>
+        /// <inheritdoc />
         public Task RunAsync(
             WorkerOptions options,
             CancellationToken cancellationToken = default)
@@ -166,10 +163,7 @@ public sealed class WorkerApplicationTests
             _exception = exception;
         }
 
-        /// <summary>Runs the worker pipe client and throws configured exception.</summary>
-        /// <param name="options">Worker options.</param>
-        /// <param name="cancellationToken">Cancellation token.</param>
-        /// <returns>Never completes; always throws.</returns>
+        /// <inheritdoc />
         public Task RunAsync(
             WorkerOptions options,
             CancellationToken cancellationToken = default)