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.CLI.Tests/Commands/AuditCommandTestHarness.cs

@@ -9,6 +9,8 @@ namespace ZB.MOM.WW.ScadaBridge.CLI.Tests.Commands;
 /// </summary>
 internal static class AuditCommandTestHarness
 {
+    /// <summary>Builds a root command with the global options and the audit command tree attached.</summary>
+    /// <returns>The configured root command.</returns>
     public static RootCommand BuildRoot()
     {
         var url = new Option<string>("--url") { Recursive = true };
@@ -33,6 +35,9 @@ internal static class AuditCommandTestHarness
     /// the returned <c>Out</c>/<c>Err</c> strings. Callers must be in the <c>Console</c>
     /// xUnit collection so the global <see cref="Console"/> redirect is not racy.
     /// </summary>
+    /// <param name="root">The root command to parse against.</param>
+    /// <param name="args">The command-line arguments to parse and invoke.</param>
+    /// <returns>The exit code and the captured standard output and error text.</returns>
     public static (int Exit, string Out, string Err) Invoke(RootCommand root, params string[] args)
     {
         var output = new StringWriter();