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/SiteAlarmLiveCacheTelemetryTests.cs

@@ -4,7 +4,7 @@ using ZB.MOM.WW.ScadaBridge.Commons.Observability;
 namespace ZB.MOM.WW.ScadaBridge.Communication.Tests;
 
 /// <summary>
-/// Telemetry guards for the aggregated live alarm cache (plan #10, Task 6): the
+/// Telemetry guards for the aggregated live alarm cache: the
 /// active-aggregator observable gauge reflects Started/Stopped, and the reconnect
 /// counter increments on each recorded reconnect. Mirrors the MeterListener read
 /// pattern used by <c>SiteStreamGrpcServerTests.SiteStreamSubscribersActiveGauge_*</c>; reads are
@@ -19,7 +19,7 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Tests;
 /// <see cref="ScadaBridgeTelemetry.LiveAlarmAggregatorStarted"/>/
 /// <see cref="ScadaBridgeTelemetry.LiveAlarmAggregatorStopped"/> from its own
 /// PreStart/PostStop, so every actor <c>Grpc.SiteAlarmAggregatorActorTests</c> spins up
-/// moves this exact gauge — serialized into the same collection (row-96 pattern) so the
+/// moves this exact gauge — serialized into the same collection (the same pattern the other telemetry tests use) so the
 /// two classes never interleave.
 /// </remarks>
 [Collection("SiteAlarmAggregatorGauge")]
@@ -61,6 +61,7 @@ public class SiteAlarmLiveCacheTelemetryTests
         return delta;
     }
 
+    /// <summary>Verifies that the active aggregator gauge reflects aggregator start and stop.</summary>
     [Fact]
     public void ActiveAggregatorGauge_ReflectsStartAndStop()
     {
@@ -92,6 +93,7 @@ public class SiteAlarmLiveCacheTelemetryTests
         Assert.Equal(baseline, ReadGauge(gauge));
     }
 
+    /// <summary>Verifies that the reconnect counter increments on each recorded reconnect.</summary>
     [Fact]
     public void ReconnectCounter_IncrementsOnEachRecordedReconnect()
     {