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.Tests/Auth/ParkedMessagesMutationRegressionTests.cs

@@ -20,6 +20,9 @@ namespace ZB.MOM.WW.ScadaBridge.CentralUI.Tests.Auth;
 
 public class ParkedMessagesMutationRegressionTests : BunitContext
 {
+    /// <summary>Verifies that a retry for a site with a non-numeric identifier is relayed only while the user's current site grant allows it.</summary>
+    /// <param name="revoke"><c>true</c> to revoke the user's site grant before retrying, <c>false</c> to keep it.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Theory]
     [InlineData(false)]
     [InlineData(true)]
@@ -69,7 +72,9 @@ public class ParkedMessagesMutationRegressionTests : BunitContext
 
     private sealed class MutableAuth(string siteId) : AuthenticationStateProvider
     {
+        /// <summary>Gets or sets the site identifier carried in the user's site-scope claim.</summary>
         public string SiteId { get; set; } = siteId;
+        /// <inheritdoc />
         public override Task<AuthenticationState> GetAuthenticationStateAsync() => Task.FromResult(new AuthenticationState(
             new ClaimsPrincipal(new ClaimsIdentity(new[] {
                 new Claim(JwtTokenService.UsernameClaimType, "operator"),
@@ -80,6 +85,8 @@ public class ParkedMessagesMutationRegressionTests : BunitContext
 
     private sealed class ReplyActor : ReceiveActor
     {
+        /// <summary>Initializes the actor with the queue that records relayed retry requests.</summary>
+        /// <param name="dispatched">The queue that receives each relayed retry envelope.</param>
         public ReplyActor(ConcurrentQueue<SiteEnvelope> dispatched)
         {
             Receive<SiteEnvelope>(envelope =>