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/GrpcSiteTransportFailoverTests.cs

@@ -33,7 +33,8 @@ public sealed class GrpcSiteTransportFailoverTests : IAsyncLifetime
     private SitePairChannelProvider _provider = null!;
     private volatile bool _preferredReachable;
 
-    /// <inheritdoc />
+    /// <summary>Starts the stub servers and builds the channel provider under test.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     public async Task InitializeAsync()
     {
         (_hostA, _stubA) = await StartServerAsync();
@@ -52,7 +53,8 @@ public sealed class GrpcSiteTransportFailoverTests : IAsyncLifetime
         _provider.UpdateSite(SiteId, EndpointA, EndpointB);
     }
 
-    /// <inheritdoc />
+    /// <summary>Stops the stub servers and disposes the channel provider after the tests.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     public async Task DisposeAsync()
     {
         _provider.Dispose();
@@ -99,6 +101,8 @@ public sealed class GrpcSiteTransportFailoverTests : IAsyncLifetime
             },
             CancellationToken.None);
 
+    /// <summary>Verifies the case: healthy Call, hits Preferred Node A, with Psk And Site Header And Deadline.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task HealthyCall_HitsPreferredNodeA_WithPskAndSiteHeaderAndDeadline()
     {
@@ -113,6 +117,8 @@ public sealed class GrpcSiteTransportFailoverTests : IAsyncLifetime
         Assert.True(_provider.IsOnPreferredNode(SiteId));
     }
 
+    /// <summary>Verifies the case: not Dispatched, on Node A, fails Over To Node B, and Stays Sticky.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task NotDispatched_OnNodeA_FailsOverToNodeB_AndStaysSticky()
     {
@@ -132,6 +138,8 @@ public sealed class GrpcSiteTransportFailoverTests : IAsyncLifetime
         Assert.Equal(2, _stubB.LifecycleCalls);
     }
 
+    /// <summary>Verifies the case: failback, returns To Preferred Node A, once Preferred Is Reachable Again.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Failback_ReturnsToPreferredNodeA_OncePreferredIsReachableAgain()
     {
@@ -152,6 +160,8 @@ public sealed class GrpcSiteTransportFailoverTests : IAsyncLifetime
         Assert.Equal(beforeA + 1, _stubA.LifecycleCalls); // next call back on A
     }
 
+    /// <summary>Verifies the case: deadline Exceeded, on Node A, is Not Retried On Node B.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task DeadlineExceeded_OnNodeA_IsNotRetriedOnNodeB()
     {
@@ -168,6 +178,8 @@ public sealed class GrpcSiteTransportFailoverTests : IAsyncLifetime
         Assert.True(_provider.IsOnPreferredNode(SiteId), "a deadline must not flip stickiness");
     }
 
+    /// <summary>Verifies the case: ambiguous Unavailable, does Not Replay Lifecycle On Peer.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task AmbiguousUnavailable_DoesNotReplayLifecycleOnPeer()
     {
@@ -181,6 +193,8 @@ public sealed class GrpcSiteTransportFailoverTests : IAsyncLifetime
         Assert.Equal(0, _stubB.LifecycleCalls);
     }
 
+    /// <summary>Verifies the case: unknown Site, throws, site Channel Unavailable.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task UnknownSite_Throws_SiteChannelUnavailable()
     {
@@ -191,7 +205,9 @@ public sealed class GrpcSiteTransportFailoverTests : IAsyncLifetime
 
     private sealed class FixedPskProvider(string key) : ISitePskProvider
     {
+        /// <inheritdoc />
         public ValueTask<string> GetAsync(string siteId, CancellationToken ct) => new(key);
+        /// <inheritdoc />
         public void Invalidate(string siteId) { }
     }
 
@@ -199,13 +215,18 @@ public sealed class GrpcSiteTransportFailoverTests : IAsyncLifetime
     private sealed class StubSiteCommandService : SiteCommandService.SiteCommandServiceBase
     {
         private int _lifecycleCalls;
+        /// <summary>Gets the number of lifecycle calls received.</summary>
         public int LifecycleCalls => Volatile.Read(ref _lifecycleCalls);
+        /// <summary>Gets the authorization header of the last call received.</summary>
         public string? LastAuthHeader { get; private set; }
+        /// <summary>Gets the site header of the last call received.</summary>
         public string? LastSiteHeader { get; private set; }
+        /// <summary>Gets a value indicating whether the last call carried a deadline.</summary>
         public bool DeadlineWasSet { get; private set; }
         public volatile bool RejectBeforeDispatch;
         public StatusCode? StatusToThrow;
 
+        /// <inheritdoc />
         public override Task<LifecycleReply> ExecuteLifecycle(LifecycleRequest request, ServerCallContext context)
         {
             Interlocked.Increment(ref _lifecycleCalls);