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.Communication.Tests/HealthReportAckTests.cs

@@ -28,6 +28,7 @@ public class HealthReportAckTests : TestKit
             new Dictionary<string, TagResolutionStatus>(),
             0, 0, new Dictionary<string, int>(), 0, 0, 0, 0);
 
+    /// <summary>Verifies that the site communication actor replies with a failure rather than staying silent when no transport is configured.</summary>
     [Fact]
     public void SiteCommunicationActor_NoTransport_RepliesFailure_NotSilence()
     {
@@ -42,6 +43,7 @@ public class HealthReportAckTests : TestKit
         ExpectMsg<Status.Failure>();
     }
 
+    /// <summary>Verifies that the central communication actor processes a health report and acknowledges it.</summary>
     [Fact]
     public void CentralCommunicationActor_OnReport_ProcessesAndAcks()
     {