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/Sta/StaRuntimeTests.cs

@@ -8,6 +8,7 @@ namespace ZB.MOM.WW.MxGateway.Worker.Tests.Sta;
 public sealed class StaRuntimeTests
 {
     /// <summary>Verifies that InvokeAsync executes commands on the STA thread.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task InvokeAsync_ExecutesCommandOnStaThread()
     {
@@ -35,6 +36,7 @@ public sealed class StaRuntimeTests
     /// correct dispatch past an arbitrary millisecond budget, which would be a
     /// false failure.
     /// </summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task InvokeAsync_WakesIdlePumpForQueuedCommand()
     {
@@ -84,6 +86,7 @@ public sealed class StaRuntimeTests
     }
 
     /// <summary>Verifies that InvokeAsync faults the returned task when a command raises an exception without stopping the runtime.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task InvokeAsync_CommandException_FaultsReturnedTaskWithoutStoppingRuntime()
     {
@@ -101,14 +104,15 @@ public sealed class StaRuntimeTests
 
     /// <summary>
     ///     Verifies that InvokeAsync returns a faulted task when called after
-    ///     Shutdown. Worker-016 introduced <see cref="StaRuntimeShutdownException"/>
-    ///     (a dedicated subtype of <see cref="InvalidOperationException"/>) so
+    ///     Shutdown. <see cref="StaRuntimeShutdownException"/> is
+    ///     a dedicated subtype of <see cref="InvalidOperationException"/> so
     ///     callers — notably <c>MxAccessStaSession.RunAlarmPollLoopAsync</c> —
     ///     can distinguish the graceful shutdown signal from a vanilla
     ///     <see cref="InvalidOperationException"/> such as an STA-affinity
     ///     assertion. The test pins the exact type so a regression that
     ///     reverts to a plain <c>InvalidOperationException</c> fails here.
     /// </summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task InvokeAsync_AfterShutdown_ReturnsFaultedTask()
     {
@@ -164,14 +168,14 @@ public sealed class StaRuntimeTests
         /// <summary>The thread ID where Uninitialize was called.</summary>
         public int? UninitializeThreadId { get; private set; }
 
-        /// <summary>Initializes the COM apartment and records the calling thread.</summary>
+        /// <inheritdoc />
         public void Initialize()
         {
             InitializeCount++;
             InitializeThreadId = Thread.CurrentThread.ManagedThreadId;
         }
 
-        /// <summary>Uninitializes the COM apartment and records the calling thread.</summary>
+        /// <inheritdoc />
         public void Uninitialize()
         {
             UninitializeCount++;