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/Protos/AuditEventProtoTests.cs

@@ -5,12 +5,13 @@ using ZB.MOM.WW.ScadaBridge.Communication.Grpc;
 namespace ZB.MOM.WW.ScadaBridge.Communication.Tests.Protos;
 
 /// <summary>
-/// Wire-format round-trip tests for the Audit Log (#23) telemetry proto messages
+/// Wire-format round-trip tests for the Audit Log telemetry proto messages
 /// (<see cref="AuditEventDto"/>, <see cref="AuditEventBatch"/>, <see cref="IngestAck"/>).
 /// Locks the additive contract the site → central audit pipeline depends on.
 /// </summary>
 public class AuditEventProtoTests
 {
+    /// <summary>Verifies that an <c>AuditEventDto</c> round trip preserves all fields.</summary>
     [Fact]
     public void AuditEventDto_RoundTrip_PreservesAllFields()
     {
@@ -66,6 +67,7 @@ public class AuditEventProtoTests
         Assert.Equal(original.Extra, deserialized.Extra);
     }
 
+    /// <summary>Verifies that an unset nullable integer is absent from the wire encoding.</summary>
     [Fact]
     public void AuditEventDto_NullableInt_AbsentByDefault_NotIncludedInWire()
     {
@@ -90,6 +92,7 @@ public class AuditEventProtoTests
         Assert.Null(deserialized.DurationMs);
     }
 
+    /// <summary>Verifies that an empty <c>AuditEventBatch</c> round-trips to an empty event list.</summary>
     [Fact]
     public void AuditEventBatch_Empty_RoundTrip_Yields_EmptyEvents()
     {
@@ -102,6 +105,7 @@ public class AuditEventProtoTests
         Assert.Empty(deserialized.Events);
     }
 
+    /// <summary>Verifies that an <c>IngestAck</c> preserves its accepted event ids.</summary>
     [Fact]
     public void IngestAck_PreservesAcceptedEventIds()
     {