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/InstanceActorChildRoutingTests.cs

@@ -11,7 +11,7 @@ using System.Text.Json;
 namespace ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests.Actors;
 
 /// <summary>
-/// PLAN-03 Task 18 (P2): the Instance Actor routes each attribute change only to the
+/// The Instance Actor routes each attribute change only to the
 /// children interested in it. A value-change / conditional script (and a monitored-attribute
 /// alarm) subscribes to a single named attribute; an Expression-triggered script/alarm hears
 /// every change (it keeps a full attribute snapshot). These tests pin the routing-map
@@ -25,6 +25,7 @@ public class InstanceActorChildRoutingTests : TestKit, IDisposable
     private readonly SiteRuntimeOptions _options;
     private readonly TestLocalDb _localDb;
 
+    /// <summary>Creates the test class with a fresh storage service and actor system.</summary>
     public InstanceActorChildRoutingTests()
     {
         _localDb = TestLocalDb.CreateTemp("instance-routing-test");
@@ -43,6 +44,7 @@ public class InstanceActorChildRoutingTests : TestKit, IDisposable
         };
     }
 
+    /// <inheritdoc />
     void IDisposable.Dispose()
     {
         // TestKit teardown first, so no in-flight actor can reach a disposed ILocalDb;
@@ -101,6 +103,7 @@ public class InstanceActorChildRoutingTests : TestKit, IDisposable
         return testRef.UnderlyingActor;
     }
 
+    /// <summary>Verifies that the routing maps are built from the trigger configurations.</summary>
     [Fact]
     public void RoutingMaps_AreBuiltFromTriggerConfigs()
     {
@@ -113,6 +116,7 @@ public class InstanceActorChildRoutingTests : TestKit, IDisposable
         Assert.Single(actor.AllChangeChildren);
     }
 
+    /// <summary>Verifies that a monitored-attribute alarm routes only to its attribute while an expression alarm routes to all changes.</summary>
     [Fact]
     public void MonitoredAttributeAlarm_RoutesToItsAttribute_ExpressionAlarm_RoutesToAllChanges()
     {