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/ReconcileServiceTests.cs

@@ -62,6 +62,8 @@ public class ReconcileServiceTests
         new(SiteIdentifier, "node-a",
             local.ToDictionary(x => x.Name, x => x.Rev));
 
+    /// <summary>Verifies that reconciliation reports missing and stale instances as gaps with fresh tokens and snapshot deployment ids, and omits current ones.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Reconcile_GapIsMissingAndStale_CurrentOmitted_WithFreshTokensAndSnapshotDeploymentIds()
     {
@@ -99,6 +101,8 @@ public class ReconcileServiceTests
         Assert.Empty(response.OrphanNames);
     }
 
+    /// <summary>Verifies that a local instance name that is not expected is reported as an orphan.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Reconcile_LocalNameNotInExpected_IsReportedAsOrphan()
     {
@@ -116,6 +120,8 @@ public class ReconcileServiceTests
         Assert.Equal("inst-Z", orphan);
     }
 
+    /// <summary>Verifies that when staging a pending deployment returns false and a row already exists, the gap carries the existing token.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Reconcile_StagePendingReturnsFalse_ExistingRowPresent_ReturnsExistingTokenInGap()
     {
@@ -162,6 +168,8 @@ public class ReconcileServiceTests
         Assert.True(gapC.IsEnabled);
     }
 
+    /// <summary>Verifies that when staging a pending deployment returns false and no row exists, that gap item is omitted.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Reconcile_StagePendingReturnsFalse_NoExistingRow_OmitsThatGapItem()
     {
@@ -192,6 +200,8 @@ public class ReconcileServiceTests
         Assert.DoesNotContain(response.Gap, g => g.InstanceUniqueName == "inst-C");
     }
 
+    /// <summary>Verifies that a gap item whose snapshot is missing is skipped.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Reconcile_SnapshotMissing_SkipsGapItem()
     {
@@ -207,6 +217,8 @@ public class ReconcileServiceTests
         Assert.Empty(response.OrphanNames);
     }
 
+    /// <summary>Verifies that reconciling an unknown site returns an empty response without throwing.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Reconcile_UnknownSite_ReturnsEmptyResponse_NoThrow()
     {