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/Monitoring/ParkedMessagesActionTests.cs

@@ -36,6 +36,8 @@ public class ParkedMessagesActionTests
 {
     private readonly PlaywrightFixture _fixture;
 
+    /// <summary>Initializes the tests with the shared Playwright fixture.</summary>
+    /// <param name="fixture">The Playwright fixture that supplies authenticated browser pages.</param>
     public ParkedMessagesActionTests(PlaywrightFixture fixture)
     {
         _fixture = fixture;
@@ -45,6 +47,7 @@ public class ParkedMessagesActionTests
     /// The Query button must be disabled on page load (no site selected) and become
     /// enabled once a site is selected from the site dropdown.
     /// </summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [SkippableFact]
     public async Task QueryButton_DisabledUntilSiteSelected()
     {
@@ -67,6 +70,7 @@ public class ParkedMessagesActionTests
     /// The Clear button must be disabled on page load (no active filters) and become
     /// enabled once any filter is changed. Clicking Clear must re-disable it.
     /// </summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [SkippableFact]
     public async Task ClearButton_DisabledUntilFilterSet_ThenResets()
     {
@@ -93,6 +97,7 @@ public class ParkedMessagesActionTests
     /// are present (the common case in a clean test environment — parked rows are not
     /// seedable from central), the test exits early as a tolerated no-op.
     /// </summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [SkippableFact]
     public async Task SelectingParkedRow_RevealsBulkRetryDiscardBar_WhenRowsPresent()
     {