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/AuditEventDtoMapperTests.cs

@@ -11,7 +11,7 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Tests;
 /// the canonical <see cref="AuditEvent"/> ↔ <see cref="AuditEventDto"/> (proto).
 /// </summary>
 /// <remarks>
-/// C3 (Task 2.5): the canonical record carries the ScadaBridge domain fields inside
+/// The canonical record carries the ScadaBridge domain fields inside
 /// <c>DetailsJson</c>; the proto contract is unchanged (24-field wire). Domain fields
 /// are read back as typed properties via <c>AsRow()</c>. <c>ForwardState</c> is
 /// site-storage-only (never on the wire) and <c>IngestedAtUtc</c> is central-set
@@ -19,6 +19,7 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Tests;
 /// </remarks>
 public class AuditEventDtoMapperTests
 {
+    /// <summary>Verifies that a fully populated event survives a DTO round trip with every field preserved.</summary>
     [Fact]
     public void ToDto_FromDto_Roundtrip_FullyPopulated_PreservesAllFields()
     {
@@ -88,6 +89,7 @@ public class AuditEventDtoMapperTests
         Assert.Null(rt.IngestedAtUtc);
     }
 
+    /// <summary>Verifies that null string fields map to empty strings in the DTO.</summary>
     [Fact]
     public void ToDto_NullableStringFields_BecomeEmptyString()
     {
@@ -115,6 +117,7 @@ public class AuditEventDtoMapperTests
         Assert.Equal(string.Empty, dto.Extra);
     }
 
+    /// <summary>Verifies that empty strings in the DTO map back to null properties.</summary>
     [Fact]
     public void FromDto_EmptyString_BecomesNullProperty()
     {
@@ -159,6 +162,7 @@ public class AuditEventDtoMapperTests
         Assert.Null(evt.Extra);
     }
 
+    /// <summary>Verifies that the occurrence timestamp keeps its UTC kind through mapping.</summary>
     [Fact]
     public void ToDto_OccurredAtUtc_PreservesUtcKind()
     {
@@ -176,6 +180,7 @@ public class AuditEventDtoMapperTests
         Assert.Equal(occurredAt, roundTripped.OccurredAtUtc);
     }
 
+    /// <summary>Verifies that a null integer maps to a null wrapped Int32 value.</summary>
     [Fact]
     public void ToDto_NullableInt_BecomesNullInt32Value()
     {
@@ -192,6 +197,7 @@ public class AuditEventDtoMapperTests
         Assert.Null(dto.DurationMs);
     }
 
+    /// <summary>Verifies that a null wrapped Int32 value maps back to a null property.</summary>
     [Fact]
     public void FromDto_NullInt32Value_BecomesNullProperty()
     {
@@ -214,6 +220,7 @@ public class AuditEventDtoMapperTests
         Assert.Null(evt.DurationMs);
     }
 
+    /// <summary>Verifies that enum values are stored in the DTO as their string names.</summary>
     [Fact]
     public void ToDto_EnumValues_StoredAsStringNames()
     {
@@ -229,6 +236,7 @@ public class AuditEventDtoMapperTests
         Assert.Equal("Parked", dto.Status);
     }
 
+    /// <summary>Verifies that a DTO round trip preserves the source node.</summary>
     [Fact]
     public void AuditEventDto_round_trip_preserves_SourceNode()
     {
@@ -249,6 +257,7 @@ public class AuditEventDtoMapperTests
         Assert.Equal("node-a", roundTripped.SourceNode);
     }
 
+    /// <summary>Verifies that a DTO round trip preserves a null source node.</summary>
     [Fact]
     public void AuditEventDto_round_trip_preserves_null_SourceNode()
     {
@@ -270,7 +279,7 @@ public class AuditEventDtoMapperTests
     }
 
     /// <summary>
-    /// C3 hardening (Task 2.5): a DTO that carries an unknown/renamed enum string
+    /// Hardening: a DTO that carries an unknown/renamed enum string
     /// for Channel, Kind, or Status must NOT throw on <see cref="AuditEventDtoMapper.FromDto"/>;
     /// it degrades gracefully to the same fallbacks used by <c>AuditRowProjection.Decompose</c>
     /// (ApiInbound / InboundRequest / Submitted).