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.Host.Tests/AkkaHealthReportTransportTests.cs

@@ -21,6 +21,8 @@ public sealed class AkkaHealthReportTransportTests
 {
     private sealed class AckActor : ReceiveActor
     {
+        /// <summary>Initializes the actor to acknowledge every health report with the given verdict.</summary>
+        /// <param name="accepted">Whether the acknowledgement reports the report as accepted.</param>
         public AckActor(bool accepted) => Receive<SiteHealthReport>(r =>
             Sender.Tell(new SiteHealthReportAck(
                 r.SiteId, r.SequenceNumber, accepted, accepted ? null : "rejected by test")));
@@ -55,6 +57,8 @@ public sealed class AkkaHealthReportTransportTests
         return svc;
     }
 
+    /// <summary>Verifies that sending completes when central acknowledges the report as accepted.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task SendAsync_AckedAccepted_Completes()
     {
@@ -68,6 +72,8 @@ public sealed class AkkaHealthReportTransportTests
         finally { await system.Terminate(); }
     }
 
+    /// <summary>Verifies that sending throws when central acknowledges the report as not accepted.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task SendAsync_AckedNotAccepted_Throws()
     {
@@ -82,6 +88,8 @@ public sealed class AkkaHealthReportTransportTests
         finally { await system.Terminate(); }
     }
 
+    /// <summary>Verifies that sending throws when no actor responds.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task SendAsync_NoResponder_Throws()
     {