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/InstanceActorChildAttributeRaceTests.cs

@@ -14,7 +14,7 @@ using System.Text.Json;
 namespace ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests.Actors;
 
 /// <summary>
-/// Regression coverage for SiteRuntime-017 — the Instance Actor must not hand its
+/// Regression coverage: the Instance Actor must not hand its
 /// own live mutable <c>_attributes</c> dictionary by reference into the
 /// <see cref="ScriptActor"/> / <see cref="AlarmActor"/> constructors.
 ///
@@ -42,6 +42,7 @@ public class InstanceActorChildAttributeRaceTests : TestKit, IDisposable
     private readonly SiteRuntimeOptions _options;
     private readonly TestLocalDb _localDb;
 
+    /// <summary>Initializes the temporary database, storage, compilation service and options used by the tests.</summary>
     public InstanceActorChildAttributeRaceTests()
     {
         _localDb = TestLocalDb.CreateTemp("instance-race-test");
@@ -60,6 +61,7 @@ public class InstanceActorChildAttributeRaceTests : TestKit, IDisposable
         };
     }
 
+    /// <inheritdoc />
     void IDisposable.Dispose()
     {
         // TestKit teardown first, so no in-flight actor can reach a disposed ILocalDb;
@@ -164,6 +166,8 @@ public class InstanceActorChildAttributeRaceTests : TestKit, IDisposable
         return (Dictionary<string, object?>)field!.GetValue(instance)!;
     }
 
+    /// <summary>Verifies that child actors are seeded from an isolated copy of the attributes, not the live attributes dictionary.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task ChildActors_AreSeededFromAnIsolatedCopy_NotTheLiveAttributesDictionary()
     {
@@ -192,7 +196,7 @@ public class InstanceActorChildAttributeRaceTests : TestKit, IDisposable
         // Every child Script Actor must have been seeded from a dictionary that
         // is NOT the Instance Actor's live _attributes field — otherwise the
         // child constructor would enumerate a dictionary the Instance Actor
-        // mutates on another thread (SiteRuntime-017).
+        // mutates on another thread.
         foreach (var name in new[] { "WorkerA", "WorkerB" })
         {
             var scriptActor = await ResolveChildInstanceAsync<ScriptActor>(testRef, $"script-{name}");