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/PendingUpdatesTests.cs

@@ -34,12 +34,17 @@ public class PendingUpdatesTests
     private readonly PlaywrightFixture _fixture;
     private readonly ITestOutputHelper _output;
 
+    /// <summary>Initializes the test class with the Playwright fixture and the test output helper.</summary>
+    /// <param name="fixture">The shared Playwright fixture.</param>
+    /// <param name="output">The xUnit test output helper.</param>
     public PendingUpdatesTests(PlaywrightFixture fixture, ITestOutputHelper output)
     {
         _fixture = fixture;
         _output = output;
     }
 
+    /// <summary>Verifies that the rail footer shows the pending-updates indicator and that it settles out of the checking state.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [SkippableFact]
     public async Task RailFooter_ShowsPendingUpdatesIndicator_AndSettles()
     {
@@ -69,6 +74,8 @@ public class PendingUpdatesTests
             $"the fleet snapshot could not be read — indicator says: {text}");
     }
 
+    /// <summary>Verifies that the Sites page shows an artifacts badge for each site and a re-check control.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [SkippableFact]
     public async Task SitesPage_ShowsAnArtifactsBadgePerSite_AndARecheckControl()
     {
@@ -115,6 +122,8 @@ public class PendingUpdatesTests
         Assert.Equal(0, await page.Locator("[aria-label='Artifacts: unavailable']").CountAsync());
     }
 
+    /// <summary>Verifies that the navigation rail has its own scroll pane at desktop width.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [SkippableFact]
     public async Task NavRail_HasAScrollPane_AtDesktopWidth()
     {