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.Security.Tests/HttpAuditActorAccessorTests.cs

@@ -23,6 +23,7 @@ public class HttpAuditActorAccessorTests
     /// </summary>
     private sealed class StubHttpContextAccessor : IHttpContextAccessor
     {
+        /// <summary>Gets or sets the http context.</summary>
         public HttpContext? HttpContext { get; set; }
     }
 
@@ -35,6 +36,7 @@ public class HttpAuditActorAccessorTests
         return ctx;
     }
 
+    /// <summary>Verifies that current actor, when authenticated, returns username claim.</summary>
     [Fact]
     public void CurrentActor_Authenticated_ReturnsUsernameClaim()
     {
@@ -48,6 +50,7 @@ public class HttpAuditActorAccessorTests
         Assert.Equal("alice", accessor.CurrentActor);
     }
 
+    /// <summary>Verifies that current actor, when authenticated, no username claim falls back to identity name.</summary>
     [Fact]
     public void CurrentActor_Authenticated_NoUsernameClaim_FallsBackToIdentityName()
     {
@@ -61,6 +64,7 @@ public class HttpAuditActorAccessorTests
         Assert.Equal("bob", accessor.CurrentActor);
     }
 
+    /// <summary>Verifies that current actor, when authenticated, prefers username over zb name.</summary>
     [Fact]
     public void CurrentActor_Authenticated_PrefersUsernameOverZbName()
     {
@@ -75,6 +79,7 @@ public class HttpAuditActorAccessorTests
         Assert.Equal("svc-user", accessor.CurrentActor);
     }
 
+    /// <summary>Verifies that current actor, when unauthenticated, returns null.</summary>
     [Fact]
     public void CurrentActor_Unauthenticated_ReturnsNull()
     {
@@ -91,6 +96,7 @@ public class HttpAuditActorAccessorTests
         Assert.Null(accessor.CurrentActor);
     }
 
+    /// <summary>Verifies that current actor, when no ambient http context, returns null.</summary>
     [Fact]
     public void CurrentActor_NoAmbientHttpContext_ReturnsNull()
     {
@@ -100,6 +106,7 @@ public class HttpAuditActorAccessorTests
         Assert.Null(accessor.CurrentActor);
     }
 
+    /// <summary>Verifies that current actor, when authenticated but no usable name, returns null.</summary>
     [Fact]
     public void CurrentActor_AuthenticatedButNoUsableName_ReturnsNull()
     {