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/Notifications/NotificationDataSeeder.cs

@@ -4,8 +4,7 @@ using ZB.MOM.WW.ScadaBridge.CentralUI.PlaywrightTests.Cluster;
 namespace ZB.MOM.WW.ScadaBridge.CentralUI.PlaywrightTests.Notifications;
 
 /// <summary>
-/// Direct-SQL seeding helper for the Notification Report page Playwright E2E tests
-/// (Notification Outbox #21).
+/// Direct-SQL seeding helper for the Notification Report page Playwright E2E tests.
 ///
 /// <para>
 /// The Notification Report page reads the central <c>Notifications</c> table through the
@@ -74,6 +73,7 @@ internal static class NotificationDataSeeder
     /// <param name="retryCount">Retry count to display on the row.</param>
     /// <param name="lastError">Optional last-error text shown beneath the subject.</param>
     /// <param name="ct">Cancellation token.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     public static async Task InsertNotificationAsync(
         Guid notificationId,
         string listNameMarker,
@@ -132,6 +132,7 @@ VALUES
     /// <param name="retryCount">Retry count to display on the row.</param>
     /// <param name="lastError">Optional last-error text shown beneath the subject.</param>
     /// <param name="ct">Cancellation token.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     public static Task InsertParkedNotificationAsync(
         Guid notificationId,
         string listNameMarker,
@@ -152,6 +153,9 @@ VALUES
     /// to <c>Pending</c> (and a subsequent dispatch sweep) does not change the <c>ListName</c>,
     /// so the marker still matches whatever terminal state the row ends in.
     /// </summary>
+    /// <param name="listNameMarker">Unique per-run marker stored in <c>ListName</c>.</param>
+    /// <param name="ct">Cancellation token.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     public static async Task DeleteByMarkerAsync(string listNameMarker, CancellationToken ct = default)
     {
         try
@@ -175,6 +179,8 @@ VALUES
     /// this so a downed cluster surfaces a clear message rather than an opaque
     /// <see cref="SqlException"/>.
     /// </summary>
+    /// <param name="ct">Cancellation token.</param>
+    /// <returns><c>true</c> if a connection could be opened; otherwise <c>false</c>.</returns>
     public static async Task<bool> IsAvailableAsync(CancellationToken ct = default)
     {
         try