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.InboundAPI.Tests/RelayProvenanceTests.cs

@@ -15,6 +15,9 @@ namespace ZB.MOM.WW.ScadaBridge.InboundAPI.Tests;
 
 public class RelayProvenanceTests
 {
+    /// <summary>Verifies that a genuine relay preserves the caller IP only when the signed request is intact.</summary>
+    /// <param name="tamper">The kind of tampering applied to the relayed request.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Theory]
     [InlineData("none")]
     [InlineData("body")]
@@ -59,6 +62,8 @@ public class RelayProvenanceTests
         if (tamper == "none") Assert.Equal(original.Items[AuditWriteMiddleware.InboundExecutionIdItemKey], row.ExecutionId);
     }
 
+    /// <summary>Verifies that directly forged forwarding headers cannot change the audited caller.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task EI5_DirectForgedForwardingHeadersCannotChangeAuditedCaller()
     {
@@ -72,6 +77,8 @@ public class RelayProvenanceTests
         Assert.Equal("10.4.5.6", extra.RootElement.GetProperty("remoteIp").GetString());
     }
 
+    /// <summary>Verifies that when every authenticated peer is standby, only the origin node emits the failure audit.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task EI1_AllAuthenticatedPeersStandby_OnlyOriginEmitsFailureAudit()
     {
@@ -98,7 +105,11 @@ public class RelayProvenanceTests
         Assert.Equal(original.Items[AuditWriteMiddleware.InboundExecutionIdItemKey], row.ExecutionId);
     }
 
-    private sealed class Standby : IActiveNodeGate { public bool IsActiveNode => false; }
+    private sealed class Standby : IActiveNodeGate
+    {
+        /// <inheritdoc />
+        public bool IsActiveNode => false;
+    }
 
     private static async Task AuditAsync(HttpContext context, Writer writer, IOptionsMonitor<InboundApiOptions> options, IActiveNodeGate? gate = null, IStandbyRequestForwarder? forwarder = null)
     {
@@ -132,21 +143,34 @@ public class RelayProvenanceTests
     }
     private sealed class Writer : ICentralAuditWriter
     {
+        /// <summary>Gets the audit events captured by this writer.</summary>
         public List<AuditEvent> Events { get; } = [];
+        /// <inheritdoc />
         public Task WriteAsync(AuditEvent evt, CancellationToken ct = default) { Events.Add(evt); return Task.CompletedTask; }
     }
     private sealed class Monitor<T>(T value) : IOptionsMonitor<T>
     {
+        /// <summary>Gets the fixed options value.</summary>
         public T CurrentValue => value;
+        /// <summary>Returns the fixed options value regardless of name.</summary>
+        /// <param name="name">The options name, ignored.</param>
+        /// <returns>The fixed options value.</returns>
         public T Get(string? name) => value;
+        /// <summary>Ignores the change listener; the fake never raises change notifications.</summary>
+        /// <param name="listener">The change listener, ignored.</param>
+        /// <returns>Always <see langword="null"/>.</returns>
         public IDisposable? OnChange(Action<T, string?> listener) => null;
     }
     private sealed class Handler(Func<HttpRequestMessage, Task<HttpResponseMessage>> send) : HttpMessageHandler
     {
+        /// <inheritdoc />
         protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) => send(request);
     }
     private sealed class Factory(HttpMessageHandler handler) : IHttpClientFactory
     {
+        /// <summary>Creates an HTTP client over the fake message handler.</summary>
+        /// <param name="name">The logical client name.</param>
+        /// <returns>An HTTP client backed by the fake handler.</returns>
         public HttpClient CreateClient(string name) => new(handler, false);
     }
 }