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/Grpc/SiteCommandDtoMapperSecretsTests.cs

@@ -7,7 +7,7 @@ namespace ZB.MOM.WW.ScadaBridge.Communication.Tests.Grpc;
 /// <summary>
 /// Round-trip tests for the additive <c>Secrets</c> / <c>SecretsApplied</c> wire contract
 /// on <see cref="DeployArtifactsCommand"/> / <see cref="ArtifactDeploymentResponse"/>
-/// (proto field 9 / field 6). Site secrets design §3.3, task-2 of
+/// (proto field 9 / field 6). Site secrets design §3.3,
 /// docs/plans/2026-09-28-site-secrets-artifact-deploy-design.md.
 /// </summary>
 public class SiteCommandDtoMapperSecretsTests
@@ -16,6 +16,7 @@ public class SiteCommandDtoMapperSecretsTests
         [1, 2, 3], [4], [5], [6, 7], [8], [9], "kek-A", 7,
         DateTimeOffset.Parse("2026-09-01T00:00:00Z"), DateTimeOffset.Parse("2026-09-02T00:00:00Z"), "d");
 
+    /// <summary>Verifies that deploy-artifacts secrets round-trip verbatim through the DTO mapper.</summary>
     [Fact]
     public void DeployArtifacts_Secrets_RoundTrip_Verbatim()
     {
@@ -37,6 +38,7 @@ public class SiteCommandDtoMapperSecretsTests
         Assert.Equal(7, back.Secrets[1].Revision);
     }
 
+    /// <summary>Verifies that null deploy-artifacts secrets stay null through the mapper.</summary>
     [Fact]
     public void DeployArtifacts_NullSecrets_StaysNull()
     {
@@ -46,6 +48,7 @@ public class SiteCommandDtoMapperSecretsTests
         Assert.Null(((DeployArtifactsCommand)SiteCommandDtoMapper.FromProto(dto)).Secrets);
     }
 
+    /// <summary>Verifies that empty deploy-artifacts secrets stay empty rather than becoming null.</summary>
     [Fact]
     public void DeployArtifacts_EmptySecrets_StaysEmpty_NotNull()
     {
@@ -56,6 +59,7 @@ public class SiteCommandDtoMapperSecretsTests
         Assert.Empty(back.Secrets!);
     }
 
+    /// <summary>Verifies that a command DTO that lacks the secrets field maps to null secrets.</summary>
     [Fact]
     public void DeployArtifacts_CommandDtoWithoutField9_MapsToNullSecrets()
     {
@@ -74,6 +78,8 @@ public class SiteCommandDtoMapperSecretsTests
         Assert.Null(back.Secrets);
     }
 
+    /// <summary>Verifies that the applied-secrets count of an artifact response round-trips through the mapper.</summary>
+    /// <param name="applied">The applied-secrets count, or <see langword="null"/> when the site did not report one.</param>
     [Theory]
     [InlineData(null)]
     [InlineData(3)]
@@ -83,6 +89,7 @@ public class SiteCommandDtoMapperSecretsTests
         Assert.Equal(applied, SiteCommandDtoMapper.FromProto(SiteCommandDtoMapper.ToProto(r)).SecretsApplied);
     }
 
+    /// <summary>Verifies that the removed-secrets list of an artifact response round-trips through the mapper.</summary>
     [Fact]
     public void ArtifactResponse_SecretsRemoved_RoundTrips()
     {
@@ -91,6 +98,7 @@ public class SiteCommandDtoMapperSecretsTests
         Assert.Equal(["old-1", "old-2"], SiteCommandDtoMapper.FromProto(SiteCommandDtoMapper.ToProto(r)).SecretsRemoved!);
     }
 
+    /// <summary>Verifies that an artifact response with no removed secrets is null on both sides of the mapper.</summary>
     [Fact]
     public void ArtifactResponse_NoSecretsRemoved_IsNullOnBothSides()
     {