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.Host.Tests/SiteEventLoggerLifetimePinTests.cs

@@ -24,7 +24,7 @@ namespace ZB.MOM.WW.ScadaBridge.Host.Tests;
 ///   <item><description><c>SiteRuntime/Actors/DeploymentManagerActor.cs</c> — per-call
 ///     resolve.</description></item>
 ///   <item><description><c>SiteRuntime/Scripts/ScriptRunLauncher.cs</c> — per-run resolve.
-///     Not among the five the register row named: it is the run body WP3.1 lifted verbatim
+///     Not among the five the register row named: it is the run body that was lifted verbatim
 ///     out of the deleted ScriptExecutionActor/AlarmExecutionActor, so it inherited the
 ///     pattern rather than adding it.</description></item>
 /// </list>
@@ -114,6 +114,7 @@ public class SiteEventLoggerLifetimePinTests
         return services;
     }
 
+    /// <summary>Verifies that <c>ISiteEventLogger</c> is registered as a singleton in the site service graph.</summary>
     [Fact]
     public void ISiteEventLogger_IsRegisteredSingleton_InTheSiteServiceGraph()
     {
@@ -125,6 +126,7 @@ public class SiteEventLoggerLifetimePinTests
             $"{Why}\nActual lifetime: {descriptor.Lifetime}.");
     }
 
+    /// <summary>Verifies that the concrete type the interface forwards to is also registered as a singleton.</summary>
     [Fact]
     public void SiteEventLogger_TheConcreteTypeTheInterfaceForwardsTo_IsAlsoSingleton()
     {