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.Communication.Tests/LowReviewTransportTests.cs

@@ -12,6 +12,9 @@ public class LowReviewTransportTests
     private static SiteStreamGrpcServer Server() => new(
         Substitute.For<ISiteStreamSubscriber>(), NullLogger<SiteStreamGrpcServer>.Instance);
 
+    /// <summary>Verifies that pull requests with an oversized batch size are rejected before any rows are read.</summary>
+    /// <param name="size">The oversized batch size requested.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Theory]
     [InlineData(2001)]
     [InlineData(int.MaxValue)]
@@ -33,6 +36,8 @@ public class LowReviewTransportTests
         Assert.Empty(store.ReceivedCalls());
     }
 
+    /// <summary>Verifies that the retired site ingest RPCs return Unimplemented even for empty batches.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task RetiredSiteIngestRpcs_ReturnUnimplementedEvenForEmptyBatches()
     {