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.StoreAndForward.Tests/ParkedOperationRelayTests.cs

@@ -9,7 +9,7 @@ using ZB.MOM.WW.ScadaBridge.TestSupport;
 namespace ZB.MOM.WW.ScadaBridge.StoreAndForward.Tests;
 
 /// <summary>
-/// Task 5 (#22 Retry/Discard relay): tests the site-side execution of a
+/// Retry/Discard relay: tests the site-side execution of a
 /// central→site <see cref="RetryParkedOperation"/> / <see cref="DiscardParkedOperation"/>
 /// relay command on the <see cref="ParkedMessageHandlerActor"/>. The cached
 /// call's S&amp;F buffer message id is the <see cref="TrackedOperationId"/>, so
@@ -23,6 +23,7 @@ public class ParkedOperationRelayTests : TestKit, IAsyncLifetime, IDisposable
     private readonly StoreAndForwardStorage _storage;
     private readonly StoreAndForwardService _service;
 
+    /// <summary>Initializes a new instance of the <c>ParkedOperationRelayTests</c> class.</summary>
     public ParkedOperationRelayTests()
     {
         _localDb = TestLocalDb.CreateTemp("RelayTests");
@@ -40,10 +41,15 @@ public class ParkedOperationRelayTests : TestKit, IAsyncLifetime, IDisposable
             _storage, options, NullLogger<StoreAndForwardService>.Instance);
     }
 
+    /// <summary>Initializes the storage before the tests run.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     public async Task InitializeAsync() => await _storage.InitializeAsync();
 
+    /// <summary>Does nothing; storage is released in <c>Dispose</c>.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     public Task DisposeAsync() => Task.CompletedTask;
 
+    /// <inheritdoc />
     protected override void Dispose(bool disposing)
     {
         if (disposing)
@@ -70,6 +76,8 @@ public class ParkedOperationRelayTests : TestKit, IAsyncLifetime, IDisposable
         await _service.RetryPendingMessagesAsync();
     }
 
+    /// <summary>Verifies that retrying a parked cached call resets it to pending and reports the change as applied.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task RetryParkedOperation_ParkedCachedCall_ResetsToPendingAndApplied()
     {
@@ -90,6 +98,8 @@ public class ParkedOperationRelayTests : TestKit, IAsyncLifetime, IDisposable
         Assert.Equal(StoreAndForwardMessageStatus.Pending, msg!.Status);
     }
 
+    /// <summary>Verifies that discarding a parked cached call removes its row and reports the change as applied.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task DiscardParkedOperation_ParkedCachedCall_RemovesRowAndApplied()
     {
@@ -107,6 +117,7 @@ public class ParkedOperationRelayTests : TestKit, IAsyncLifetime, IDisposable
         Assert.Null(msg);
     }
 
+    /// <summary>Verifies that retrying an unknown operation is a safe no-op.</summary>
     [Fact]
     public void RetryParkedOperation_UnknownOperation_IsSafeNoOp()
     {
@@ -120,6 +131,8 @@ public class ParkedOperationRelayTests : TestKit, IAsyncLifetime, IDisposable
         Assert.Null(ack.ErrorMessage);
     }
 
+    /// <summary>Verifies that retrying a non-parked operation is a safe no-op that does not corrupt the row.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task RetryParkedOperation_NonParkedOperation_IsSafeNoOpAndDoesNotCorrupt()
     {
@@ -148,6 +161,8 @@ public class ParkedOperationRelayTests : TestKit, IAsyncLifetime, IDisposable
         Assert.Equal(before.RetryCount, after.RetryCount);
     }
 
+    /// <summary>Verifies that discarding a non-parked operation is a safe no-op.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task DiscardParkedOperation_NonParkedOperation_IsSafeNoOp()
     {