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/PendingDeploymentPurgeActorTests.cs

@@ -39,6 +39,7 @@ public class PendingDeploymentPurgeActorTests : TestKit
             sp, options, NullLogger<PendingDeploymentPurgeActor>.Instance)));
     }
 
+    /// <summary>Verifies that a tick purges expired rows using the current time as the threshold.</summary>
     [Fact]
     public void Tick_PurgesExpiredRows_WithNowThreshold()
     {
@@ -72,6 +73,7 @@ public class PendingDeploymentPurgeActorTests : TestKit
         Assert.InRange(captured, before, after);
     }
 
+    /// <summary>Verifies that the actor survives a purge failure and retries on the next interval.</summary>
     [Fact]
     public void Tick_PurgeThrows_ActorSurvives_AndRetriesOnNextInterval()
     {
@@ -99,7 +101,7 @@ public class PendingDeploymentPurgeActorTests : TestKit
         }
         finally
         {
-            // Row-95/row-82 pattern: a 100ms self-scheduling ticker left running strands
+            // Pattern: a 100ms self-scheduling ticker left running strands
             // later tests in the same assembly (it keeps firing — and keeps calling the
             // now-disposed repo/service-provider — for the rest of the process). Stop it
             // deterministically before the test ends.