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.SiteRuntime.Tests/Actors/InstanceActorMesReportableSnapshotTests.cs

@@ -29,6 +29,7 @@ public class InstanceActorMesReportableSnapshotTests : TestKit, IDisposable
     private readonly SiteRuntimeOptions _options = new();
     private readonly TestLocalDb _localDb;
 
+    /// <summary>Initializes the test class with a temporary storage setup.</summary>
     public InstanceActorMesReportableSnapshotTests()
     {
         _localDb = TestLocalDb.CreateTemp("instance-mes-reportable");
@@ -99,6 +100,7 @@ public class InstanceActorMesReportableSnapshotTests : TestKit, IDisposable
             m => m.CorrelationId == correlationId, TimeSpan.FromSeconds(1));
     }
 
+    /// <summary>Verifies that the alarm snapshot stamps the MES-reportable flag on both fired and unfired alarms.</summary>
     [Fact]
     public void AlarmSnapshot_StampsIsMesReportable_OnFiredAndUnfiredAlarms()
     {
@@ -136,6 +138,7 @@ public class InstanceActorMesReportableSnapshotTests : TestKit, IDisposable
         Assert.False(unfired.IsMesReportable);
     }
 
+    /// <summary>Verifies that an unfired reportable alarm is stamped before it ever fires.</summary>
     [Fact]
     public void AlarmSnapshot_UnfiredReportableAlarm_IsStampedBeforeItEverFires()
     {
@@ -151,6 +154,7 @@ public class InstanceActorMesReportableSnapshotTests : TestKit, IDisposable
         Assert.False(Assert.Single(snapshot.Alarms, a => a.AlarmName == "TempSpike").IsMesReportable);
     }
 
+    /// <inheritdoc />
     void IDisposable.Dispose()
     {
         // TestKit teardown first, so no in-flight actor can reach a disposed ILocalDb;