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.IntegrationTests/StartupValidationTests.cs

@@ -4,7 +4,7 @@ using Microsoft.AspNetCore.Mvc.Testing;
 namespace ZB.MOM.WW.ScadaBridge.IntegrationTests;
 
 /// <summary>
-/// WP-22: Startup validation — missing required config fails with clear error.
+/// Startup validation — missing required config fails with clear error.
 /// Tests the StartupValidator that runs on boot.
 ///
 /// Note: These tests temporarily set environment variables because Program.cs reads
@@ -13,6 +13,7 @@ namespace ZB.MOM.WW.ScadaBridge.IntegrationTests;
 /// </summary>
 public class StartupValidationTests
 {
+    /// <summary>Verifies that a missing role throws an InvalidOperationException.</summary>
     [Fact]
     public void MissingRole_ThrowsInvalidOperationException()
     {
@@ -34,6 +35,7 @@ public class StartupValidationTests
         factory.Dispose();
     }
 
+    /// <summary>Verifies that a missing JWT signing key for the Central role throws an InvalidOperationException.</summary>
     [Fact]
     public void MissingJwtSigningKey_ForCentral_ThrowsInvalidOperationException()
     {
@@ -59,6 +61,7 @@ public class StartupValidationTests
         factory.Dispose();
     }
 
+    /// <summary>Verifies that the Central role starts successfully with a valid configuration.</summary>
     [Fact]
     public void CentralRole_StartsSuccessfully_WithValidConfig()
     {
@@ -101,6 +104,8 @@ public class StartupValidationTests
             "ScadaBridge__Security__Ldap__ServiceAccountPassword",
         };
 
+        /// <summary>Sets the given environment variables, remembering the prior values so they can be restored.</summary>
+        /// <param name="varsToSet">The environment variables to set.</param>
         public TempEnvironment(Dictionary<string, string> varsToSet)
         {
             // Save and clear all known keys
@@ -119,6 +124,7 @@ public class StartupValidationTests
             }
         }
 
+        /// <summary>Releases the resources held by this test class.</summary>
         public void Dispose()
         {
             foreach (var (key, previousValue) in _previousValues)