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.IntegrationTests/DualNodeRecoveryTests.cs

@@ -6,12 +6,14 @@ using ZB.MOM.WW.ScadaBridge.TestSupport;
 namespace ZB.MOM.WW.ScadaBridge.IntegrationTests;
 
 /// <summary>
-/// WP-3 (Phase 8): Dual-node failure recovery.
+/// Dual-node failure recovery.
 /// Both nodes down, first up forms cluster, rebuilds from persistent storage.
 /// Tests for both central and site topologies.
 /// </summary>
 public class DualNodeRecoveryTests
 {
+    /// <summary>Verifies that after both site nodes go down the first node rebuilds its state from SQLite.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Trait("Category", "Integration")]
     [Fact]
     public async Task SiteTopology_BothNodesDown_FirstNodeRebuildsFromSQLite()
@@ -83,6 +85,8 @@ public class DualNodeRecoveryTests
         }
     }
 
+    /// <summary>Verifies that parked messages are preserved across a dual crash of a site pair.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Trait("Category", "Integration")]
     [Fact]
     public async Task SiteTopology_DualCrash_ParkedMessagesPreserved()
@@ -154,6 +158,7 @@ public class DualNodeRecoveryTests
         }
     }
 
+    /// <summary>Verifies that after both central nodes go down the first node forms a single-node cluster.</summary>
     [Trait("Category", "Integration")]
     [Fact]
     public void CentralTopology_BothNodesDown_FirstNodeFormsSingleNodeCluster()
@@ -185,6 +190,8 @@ public class DualNodeRecoveryTests
         Assert.Equal(DeploymentStatus.InProgress, statuses[1].Status);
     }
 
+    /// <summary>Verifies that initializing the SQLite storage repeatedly is idempotent and safe during recovery.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Trait("Category", "Integration")]
     [Fact]
     public async Task SQLiteStorage_InitializeIdempotent_SafeOnRecovery()