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/SiteCommandSamples.cs

@@ -28,7 +28,7 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Tests;
 /// The two-sample rule is the point. A single "typical" sample proves only that
 /// the happy path survives; the pairs are what catch a dropped optional field or
 /// a null/empty collapse — the class of silent data loss the transport
-/// round-trip guard exposed in PLAN-05 T8, which per-field unit tests had all
+/// round-trip guard exposed by the transport round-trip guard, which per-field unit tests had all
 /// missed.
 /// </para>
 /// <para>
@@ -222,7 +222,7 @@ internal static class SiteCommandSamples
     private static SharedScriptArtifact SharedScript() =>
         new("Calc", "return 1;", "{\"p\":\"int\"}", "{\"r\":\"int\"}");
 
-    // MaxRetries/RetryDelay are non-default on purpose: they are the deferred-work-row-27
+    // MaxRetries/RetryDelay are non-default on purpose: they are the deferred-work
     // additions (proto fields 7-8), and the generic round-trip assertion is what pins them
     // to the wire. A sample left at the defaults would round-trip vacuously.
     private static ExternalSystemArtifact ExternalSystem() =>