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.NotificationOutbox.Tests/Ingest/NotificationIngestTypeStampingTests.cs

@@ -26,6 +26,7 @@ public class NotificationIngestTypeStampingTests : TestKit
     private readonly INotificationRepository _listRepository =
         Substitute.For<INotificationRepository>();
 
+    /// <summary>Initializes a new instance of the <c>NotificationIngestTypeStampingTests</c> class.</summary>
     public NotificationIngestTypeStampingTests()
     {
         // Default: a fresh insert succeeds. Individual tests configure the list lookup.
@@ -72,6 +73,7 @@ public class NotificationIngestTypeStampingTests : TestKit
             .Returns(new NotificationList(name) { Type = type });
     }
 
+    /// <summary>Verifies that ingesting a notification for an email-typed list stamps the type as email.</summary>
     [Fact]
     public void Ingest_EmailTypedList_StampsEmail()
     {
@@ -90,6 +92,7 @@ public class NotificationIngestTypeStampingTests : TestKit
             Arg.Any<CancellationToken>());
     }
 
+    /// <summary>Verifies that ingesting a notification for an SMS-typed list stamps the type as SMS.</summary>
     [Fact]
     public void Ingest_SmsTypedList_StampsSms()
     {
@@ -108,6 +111,7 @@ public class NotificationIngestTypeStampingTests : TestKit
             Arg.Any<CancellationToken>());
     }
 
+    /// <summary>Verifies that ingesting a notification for a missing list stamps the default type of email.</summary>
     [Fact]
     public void Ingest_MissingList_StampsEmailDefault()
     {