docs(tests): fix CommentChecker findings across tests/ — 13,392 → 0 (repo-wide scan clean)

Comment/XML-doc changes only:
- add summaries to ~10k test methods, fixtures, fakes and helpers
  (+ <param> on theories, <returns> on async Task methods,
  <inheritdoc/> on interface implementations the checker can resolve)
- strip ~2.6k project-tracking references (WP*, P*-*, row-NN, Task N,
  #NN, Component-0NN) from comments, keeping the explanatory text;
  reword false positives in comments only
- real docs on fakes implementing BCL/library interfaces
  (IDisposable, ILogger, IOptionsMonitor, IAsyncLifetime)
- reword the last 5 src/ false positives (CWE-1236, failures-1,
  year-0001, M365)

Only non-comment edits: four one-line nested classes split across lines
so members can carry docs. Build 0 errors / 0 warnings.

tests/ZB.MOM.WW.ScadaBridge.CentralUI.Tests/PollGateTests.cs

@@ -5,6 +5,8 @@ namespace ZB.MOM.WW.ScadaBridge.CentralUI.Tests;
 
 public class PollGateTests
 {
+    /// <summary>Verifies that a rejected renderer dispatch releases the gate and reports the fault.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task RejectedRendererDispatch_ReleasesGateAndObservesFault()
     {
@@ -15,6 +17,7 @@ public class PollGateTests
         Assert.True(gate.TryEnter());
     }
 
+    /// <summary>Verifies that a second entry attempt while the gate is held returns false.</summary>
     [Fact]
     public void TryEnter_SecondCallWhileHeld_ReturnsFalse()
     {