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.IntegrationTests/LocalDbPhase2ConvergenceTests.cs

@@ -66,6 +66,8 @@ public sealed class LocalDbPhase2ConvergenceTests : LocalDbSitePairHarness
 
     // ---- scenarios --------------------------------------------------------------------
 
+    /// <summary>Verifies that a deployed configuration row converges to node B column for column.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task DeployedConfigRow_ConvergesToB_ColumnForColumn()
     {
@@ -85,6 +87,8 @@ public sealed class LocalDbPhase2ConvergenceTests : LocalDbSitePairHarness
             "node B's deployed_configurations row to match node A's in EVERY column");
     }
 
+    /// <summary>Verifies that removing an instance converges deletions across all three cascade tables.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task RemovingAnInstance_ConvergesAllThreeCascadeTables()
     {
@@ -132,11 +136,13 @@ public sealed class LocalDbPhase2ConvergenceTests : LocalDbSitePairHarness
         Assert.Equal(1, await CountAsync(B, "native_alarm_state", "inst-survivor"));
     }
 
+    /// <summary>Verifies that a native alarm burst converges to the peer and the oplog drains afterwards.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task ANativeAlarmBurst_Converges_AndTheOplogDrains()
     {
-        // native_alarm_state is the highest-rate replicated table (Task 1 found it bounded by
-        // per-SourceReference coalescing on a 100 ms flush, correcting the plan's D4). This
+        // native_alarm_state is the highest-rate replicated table (it is bounded by
+        // per-SourceReference coalescing on a 100 ms flush). This
         // asserts the burst converges AND that the oplog goes back to empty afterwards —
         // convergence alone would still pass if entries replicated but were never acked, and
         // an oplog that only grows eventually trips the caps and forces a snapshot resync.
@@ -159,6 +165,8 @@ public sealed class LocalDbPhase2ConvergenceTests : LocalDbSitePairHarness
             "node A's oplog to drain once node B acknowledges the burst");
     }
 
+    /// <summary>Verifies that rows written on node B while its listener is down survive the rejoin.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task RowsWrittenOnBWhileItsListenerIsDown_SurviveTheRejoin()
     {