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.PlaywrightTests/Cluster/ClusterAvailability.cs

@@ -5,7 +5,7 @@ namespace ZB.MOM.WW.ScadaBridge.CentralUI.PlaywrightTests.Cluster;
 /// reachable through the CLI. State-changing E2E tests gate their setup on this so
 /// a downed cluster surfaces as a Skipped fact (via <c>Skip.IfNot</c>) rather than
 /// an opaque failure. The result is cached for the process; <see cref="SkippedCount"/>
-/// is bumped each time a test would skip and is logged at suite teardown (Task 3).
+/// is bumped each time a test would skip and is logged at suite teardown.
 /// </summary>
 public static class ClusterAvailability
 {
@@ -18,7 +18,7 @@ public static class ClusterAvailability
     /// <summary>
     /// Number of times a test would have skipped because the cluster is
     /// unavailable. Incremented on every <see cref="IsAvailableAsync"/> call that
-    /// returns <see langword="false"/>; logged at suite teardown (Task 3).
+    /// returns <see langword="false"/>; logged at suite teardown.
     /// </summary>
     public static int SkippedCount;
 
@@ -26,6 +26,7 @@ public static class ClusterAvailability
     /// Returns whether the cluster is reachable, probing once (a <c>site list</c>
     /// round-trip through the CLI) and caching the result for the process.
     /// </summary>
+    /// <returns><see langword="true"/> when the cluster is reachable; otherwise <see langword="false"/>.</returns>
     public static async Task<bool> IsAvailableAsync()
     {
         if (_cached is { } cached)