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/Secrets/DeployedSecretsMirrorRealStackTests.cs

@@ -13,7 +13,7 @@ using ZB.MOM.WW.Secrets.Sqlite;
 namespace ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests.Secrets;
 
 /// <summary>
-/// Task 9 fix round 2 (review <c>task-9-rereview-1.md</c> recommendation #2): runs
+/// Runs
 /// <see cref="DeployedSecretsMirror"/> against the REAL <c>ZB.MOM.WW.Secrets</c> stack —
 /// <see cref="SqliteSecretStore"/> + <see cref="AesGcmEnvelopeCipher"/> +
 /// <see cref="DefaultSecretResolver"/> over a real temp-file SQLite database — instead of the
@@ -40,6 +40,8 @@ public sealed class DeployedSecretsMirrorRealStackTests : IAsyncLifetime, IDispo
     private DefaultSecretResolver _resolver = null!;
     private SiteStorageService _storage = null!;
 
+    /// <summary>Prepares the test fixture before the first test runs.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     public async Task InitializeAsync()
     {
         var connectionFactory = new SecretsSqliteConnectionFactory(_secretsDbPath);
@@ -58,8 +60,11 @@ public sealed class DeployedSecretsMirrorRealStackTests : IAsyncLifetime, IDispo
         await _storage.InitializeAsync();
     }
 
+    /// <summary>Does nothing; cleanup happens in <c>Dispose</c>.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     public Task DisposeAsync() => Task.CompletedTask;
 
+    /// <summary>Releases the resources held by this instance.</summary>
     public void Dispose()
     {
         var path = _localDb.Path;
@@ -71,6 +76,8 @@ public sealed class DeployedSecretsMirrorRealStackTests : IAsyncLifetime, IDispo
         }
     }
 
+    /// <summary>Verifies that against the real secrets stack an encrypt, apply, delete and re-add cycle yields a recovered row that resolves to the original plaintext.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task RealStack_EncryptApplyDeleteReAdd_TheRecoveredRowResolvesToTheOriginalPlaintext()
     {
@@ -150,10 +157,15 @@ public sealed class DeployedSecretsMirrorRealStackTests : IAsyncLifetime, IDispo
     {
         private readonly byte[] _key = System.Security.Cryptography.RandomNumberGenerator.GetBytes(32);
 
+        /// <summary>Initializes the provider with a key encryption key id.</summary>
+        /// <param name="kekId">The key encryption key id reported by the provider.</param>
         public FakeMasterKeyProvider(string kekId) => KekId = kekId;
 
+        /// <summary>Gets the key encryption key id.</summary>
         public string KekId { get; }
 
+        /// <summary>Returns the fixed master key.</summary>
+        /// <returns>The master key bytes.</returns>
         public ReadOnlyMemory<byte> GetMasterKey() => _key;
     }
 }