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.CentralUI.Tests/Shared/TimestampDisplayTests.cs

@@ -4,16 +4,17 @@ using ZB.MOM.WW.ScadaBridge.CentralUI.Components.Shared;
 namespace ZB.MOM.WW.ScadaBridge.CentralUI.Tests.Shared;
 
 /// <summary>
-/// Regression tests for HealthMonitoring-015. A heartbeat-only registered site has
+/// Regression tests for rendering a null timestamp. A heartbeat-only registered site has
 /// a <c>null</c> <c>LastReportReceivedAt</c> ("no full report yet"). The health
 /// dashboard passes that value straight into <see cref="TimestampDisplay"/>, so the
 /// component's <c>Value</c> must accept <c>DateTimeOffset?</c> and render a
 /// <c>null</c> as a human-readable placeholder ("never") instead of the
-/// <c>DateTimeOffset.MinValue</c> year-0001 sentinel. Non-null callers must keep
+/// <c>DateTimeOffset.MinValue</c> year 0001 sentinel. Non-null callers must keep
 /// rendering the formatted timestamp exactly as before.
 /// </summary>
 public class TimestampDisplayTests : BunitContext
 {
+    /// <summary>Verifies that a non-null value renders as a formatted timestamp.</summary>
     [Fact]
     public void Render_NonNullValue_ShowsFormattedTimestamp()
     {
@@ -28,6 +29,7 @@ public class TimestampDisplayTests : BunitContext
         Assert.Contains("2026-05-17 14:30:45 UTC", span.GetAttribute("title")!);
     }
 
+    /// <summary>Verifies that a null value renders the "never" placeholder.</summary>
     [Fact]
     public void Render_NullValue_ShowsNeverPlaceholder()
     {
@@ -38,13 +40,14 @@ public class TimestampDisplayTests : BunitContext
         Assert.Contains("never", cut.Markup, StringComparison.OrdinalIgnoreCase);
     }
 
+    /// <summary>Verifies that a null value does not render the year 0001 minimum-value sentinel.</summary>
     [Fact]
     public void Render_NullValue_DoesNotRenderYear0001Sentinel()
     {
         var cut = Render<TimestampDisplay>(parameters => parameters
             .Add(p => p.Value, (DateTimeOffset?)null));
 
-        // The year-0001 DateTimeOffset.MinValue sentinel must never reach the UI.
+        // The year 0001 DateTimeOffset.MinValue sentinel must never reach the UI.
         Assert.DoesNotContain("0001", cut.Markup);
     }
 }