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.Communication.Tests/Grpc/CentralControlGrpcServiceTests.cs

@@ -32,6 +32,8 @@ public class CentralControlGrpcServiceTests : TestKit
             NullLogger<CentralControlGrpcService>.Instance,
             Options.Create(options ?? new CommunicationOptions()));
 
+    /// <summary>Verifies that a unary call made before the service is set ready fails as unavailable.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task BeforeSetReady_AUnaryCall_IsUnavailable()
     {
@@ -45,6 +47,8 @@ public class CentralControlGrpcServiceTests : TestKit
         Assert.Equal(StatusCode.Unavailable, ex.StatusCode);
     }
 
+    /// <summary>Verifies that a non-empty ingest batch sent before the service is set ready fails as unavailable.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task BeforeSetReady_ANonEmptyIngestBatch_IsUnavailable()
     {
@@ -58,6 +62,8 @@ public class CentralControlGrpcServiceTests : TestKit
         Assert.Equal(StatusCode.Unavailable, ex.StatusCode);
     }
 
+    /// <summary>Verifies that a unary call made after the service is set ready reaches the actor.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task AfterSetReady_AUnaryCall_ReachesTheActor()
     {
@@ -70,6 +76,8 @@ public class CentralControlGrpcServiceTests : TestKit
         Assert.True(ack.Accepted);
     }
 
+    /// <summary>Verifies that a heartbeat before the service is set ready succeeds and is dropped.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Heartbeat_BeforeSetReady_SucceedsAndIsDropped()
     {
@@ -82,6 +90,8 @@ public class CentralControlGrpcServiceTests : TestKit
         Assert.NotNull(reply);
     }
 
+    /// <summary>Verifies that a heartbeat after the service is set ready is told to the actor and never asked.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Heartbeat_AfterSetReady_TellsTheActor_AndNeverAsks()
     {
@@ -96,6 +106,8 @@ public class CentralControlGrpcServiceTests : TestKit
         Assert.NotNull(reply);
     }
 
+    /// <summary>Verifies that a call to an actor that never replies fails with deadline exceeded rather than unavailable.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task WhenTheActorNeverReplies_TheCall_IsDeadlineExceeded_NotUnavailable()
     {
@@ -114,6 +126,8 @@ public class CentralControlGrpcServiceTests : TestKit
         Assert.Equal(StatusCode.DeadlineExceeded, ex.StatusCode);
     }
 
+    /// <summary>Verifies that an empty ingest batch short-circuits even before the service is set ready.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task EmptyIngestBatch_ShortCircuits_EvenBeforeSetReady()
     {
@@ -125,6 +139,7 @@ public class CentralControlGrpcServiceTests : TestKit
         Assert.Empty(ack.AcceptedEventIds);
     }
 
+    /// <summary>Verifies that the audit ingest timeout is the single shared constant.</summary>
     [Fact]
     public void TheAuditIngestTimeout_IsTheOneSharedConstant()
     {
@@ -166,6 +181,7 @@ public class CentralControlGrpcServiceTests : TestKit
 
     private sealed class StubActor : ReceiveActor
     {
+        /// <summary>Creates the actor, which acknowledges every notification submit as accepted.</summary>
         public StubActor()
         {
             Receive<NotificationSubmit>(msg =>
@@ -176,6 +192,7 @@ public class CentralControlGrpcServiceTests : TestKit
     /// <summary>Swallows every message and never replies, so an Ask against it times out.</summary>
     private sealed class NeverRepliesActor : ReceiveActor
     {
+        /// <summary>Creates the actor, which ignores every message.</summary>
         public NeverRepliesActor() => ReceiveAny(_ => { });
     }
 }