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/CentralControlEndToEndTests.cs

@@ -53,7 +53,8 @@ public class CentralControlEndToEndTests : IAsyncLifetime
     private ActorSystem _actorSystem = null!;
     private CentralControlGrpcService _service = null!;
 
-    /// <inheritdoc />
+    /// <summary>Starts the in-memory host, actor system and gRPC service under test.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     public async Task InitializeAsync()
     {
         _actorSystem = ActorSystem.Create("centralcontrol-e2e-test");
@@ -94,7 +95,8 @@ public class CentralControlEndToEndTests : IAsyncLifetime
         _server = _host.GetTestServer();
     }
 
-    /// <inheritdoc />
+    /// <summary>Stops the host and actor system and releases test resources.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     public async Task DisposeAsync()
     {
         await _host.StopAsync();
@@ -118,6 +120,9 @@ public class CentralControlEndToEndTests : IAsyncLifetime
 
     // ---- Auth positives / negatives, all through the real pipeline ----
 
+    /// <summary>Verifies that site A's key presented for a foreign site is denied before any actor dispatch.</summary>
+    /// <param name="rpc">The rpc.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Theory]
     [InlineData("reconcile")]
     [InlineData("notification")]
@@ -147,6 +152,8 @@ public class CentralControlEndToEndTests : IAsyncLifetime
         Assert.Equal(0, Volatile.Read(ref _dispatches));
     }
 
+    /// <summary>Verifies that the correct site and key reach the service on a unary call.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task CorrectSiteAndKey_ReachesTheService_OnAUnaryCall()
     {
@@ -157,6 +164,8 @@ public class CentralControlEndToEndTests : IAsyncLifetime
         Assert.True(ack.Accepted);
     }
 
+    /// <summary>Verifies no credentials at all is rejected with permission denied.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task NoCredentialsAtAll_IsRejected_WithPermissionDenied()
     {
@@ -168,6 +177,8 @@ public class CentralControlEndToEndTests : IAsyncLifetime
         Assert.Equal(StatusCode.PermissionDenied, ex.StatusCode);
     }
 
+    /// <summary>Verifies that a wrong key for the site is rejected with a permission-denied status.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task WrongKeyForTheSite_IsRejected_WithPermissionDenied()
     {
@@ -180,6 +191,8 @@ public class CentralControlEndToEndTests : IAsyncLifetime
         Assert.Equal(StatusCode.PermissionDenied, ex.StatusCode);
     }
 
+    /// <summary>Verifies that an unknown site is rejected with a permission-denied status.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task UnknownSite_IsRejected_WithPermissionDenied()
     {
@@ -191,6 +204,8 @@ public class CentralControlEndToEndTests : IAsyncLifetime
         Assert.Equal(StatusCode.PermissionDenied, ex.StatusCode);
     }
 
+    /// <summary>Verifies the accept and reject paths are distinguishable.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task TheAcceptAndRejectPathsAreDistinguishable()
     {
@@ -207,6 +222,8 @@ public class CentralControlEndToEndTests : IAsyncLifetime
 
     // ---- One RPC per shape: unary (above) + the ingest bridge ----
 
+    /// <summary>Verifies that ingesting audit events decodes the batch, asks the ingest proxy and encodes the ack.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task IngestAuditEvents_DecodesTheBatch_AsksTheIngestProxy_EncodesTheAck()
     {
@@ -224,6 +241,8 @@ public class CentralControlEndToEndTests : IAsyncLifetime
         Assert.Contains(AcceptedId.ToString(), ack.AcceptedEventIds);
     }
 
+    /// <summary>Verifies that ingesting an empty audit-event batch short-circuits without asking the ingest proxy.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task IngestAuditEvents_EmptyBatch_ShortCircuits_WithoutAskingTheIngestProxy()
     {
@@ -259,17 +278,21 @@ public class CentralControlEndToEndTests : 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) { }
     }
 
     private sealed class MapPskProvider(IReadOnlyDictionary<string, string> keys) : ISitePskProvider
     {
+        /// <inheritdoc />
         public ValueTask<string> GetAsync(string siteId, CancellationToken ct)
             => keys.TryGetValue(siteId, out var key)
                 ? new ValueTask<string>(key)
                 : throw new InvalidOperationException($"no key for '{siteId}'");
 
+        /// <inheritdoc />
         public void Invalidate(string siteId) { }
     }
 
@@ -280,6 +303,9 @@ public class CentralControlEndToEndTests : IAsyncLifetime
     /// </summary>
     private sealed class StubCentralActor : ReceiveActor
     {
+        /// <summary>Initializes a new instance of the <c>StubCentralActor</c> class.</summary>
+        /// <param name="acceptedId">The accepted id.</param>
+        /// <param name="dispatched">The dispatched.</param>
         public StubCentralActor(Guid acceptedId, Action dispatched)
         {
             Receive<NotificationSubmit>(msg => { dispatched();