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.CLI.Tests/ExitCodeTests.cs

@@ -4,7 +4,7 @@ using ZB.MOM.WW.ScadaBridge.CLI.Commands;
 namespace ZB.MOM.WW.ScadaBridge.CLI.Tests;
 
 /// <summary>
-/// Regression tests for CLI-009 — the design doc defines exit code 2 as "authorization
+/// Regression tests for the exit-code contract: the design doc defines exit code 2 as "authorization
 /// failure". The previous implementation keyed exit 2 solely off HTTP 403, so an
 /// authorization failure the server signalled with an error <c>code</c> of
 /// <c>UNAUTHORIZED</c>/<c>FORBIDDEN</c> but a different HTTP status was misreported as a
@@ -27,12 +27,15 @@ public class ExitCodeTests
         }
     }
 
+    /// <summary>Verifies that an HTTP 403 response returns exit code 2.</summary>
     [Fact]
     public void HandleResponse_Http403_ReturnsTwo()
     {
         Assert.Equal(2, HandleQuietly(new ManagementResponse(403, null, "Forbidden", "FORBIDDEN")));
     }
 
+    /// <summary>Verifies that an authorization error code with a status other than 403 still returns exit code 2.</summary>
+    /// <param name="code">The error code returned by the server.</param>
     [Theory]
     [InlineData("UNAUTHORIZED")]
     [InlineData("FORBIDDEN")]
@@ -40,16 +43,18 @@ public class ExitCodeTests
     public void HandleResponse_AuthorizationCode_NonForbiddenStatus_ReturnsTwo(string code)
     {
         // The server signalled an authorization failure via the error code but with a
-        // non-403 HTTP status; per the documented exit-code table this is still exit 2.
+        // HTTP status other than 403 status; per the documented exit-code table this is still exit 2.
         Assert.Equal(2, HandleQuietly(new ManagementResponse(400, null, "Access denied", code)));
     }
 
+    /// <summary>Verifies that a generic error returns exit code 1.</summary>
     [Fact]
     public void HandleResponse_GenericError_ReturnsOne()
     {
         Assert.Equal(1, HandleQuietly(new ManagementResponse(400, null, "Validation failed", "INVALID_ARGUMENT")));
     }
 
+    /// <summary>Verifies that an authentication failure returns exit code 1.</summary>
     [Fact]
     public void HandleResponse_AuthenticationFailure_ReturnsOne()
     {