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/SmtpConfigTests.cs

@@ -40,6 +40,8 @@ public class SmtpConfigTests
 
     private readonly PlaywrightFixture _pw;
 
+    /// <summary>Initializes a new instance of the <see cref="SmtpConfigTests"/> class.</summary>
+    /// <param name="pw">The shared Playwright fixture.</param>
     public SmtpConfigTests(PlaywrightFixture pw)
     {
         _pw = pw;
@@ -51,6 +53,7 @@ public class SmtpConfigTests
     /// The page's <c>Save</c> handler returns at this guard BEFORE persisting, so this fact
     /// mutates nothing. Then it cancels and asserts the form closed.
     /// </summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [SkippableFact]
     public async Task SmtpForm_MissingRequired_ShowsInlineError()
     {
@@ -95,6 +98,7 @@ public class SmtpConfigTests
     /// card (Credentials value '(stored)' or '(not set)') is present, OR the empty-state
     /// 'No SMTP configuration set.' text is shown. Pure-read; mutates nothing.
     /// </summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [SkippableFact]
     public async Task SmtpPage_RendersConfigOrEmptyState()
     {
@@ -130,6 +134,7 @@ public class SmtpConfigTests
     /// skips (SMTP config has no delete verb, so we never create one we could not delete).
     /// </para>
     /// </summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [SkippableFact]
     public async Task SmtpEdit_NoopSave_ShowsSavedToast()
     {