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/Admin/SitesPageTests.cs

@@ -19,7 +19,7 @@ using SitesPage = ZB.MOM.WW.ScadaBridge.CentralUI.Components.Pages.Admin.Sites;
 namespace ZB.MOM.WW.ScadaBridge.CentralUI.Tests.Admin;
 
 /// <summary>
-/// Regression tests for CentralUI-012. The Sites page loaded all sites and then
+/// Regression tests for the Sites page N+1 query fix. The Sites page loaded all sites and then
 /// issued <c>GetDataConnectionsBySiteIdAsync</c> once per site (N+1 database
 /// round-trips on every load and post-delete refresh). The fix fetches all
 /// data connections in a single <c>GetAllDataConnectionsAsync</c> call and
@@ -73,7 +73,10 @@ public class SitesPageTests : BunitContext
     private sealed class StubAuthStateProvider : AuthenticationStateProvider
     {
         private readonly AuthenticationState _state;
+        /// <summary>Initializes a new instance of the <see cref="StubAuthStateProvider"/> class.</summary>
+        /// <param name="state">The authentication state returned to callers.</param>
         public StubAuthStateProvider(AuthenticationState state) => _state = state;
+        /// <inheritdoc />
         public override Task<AuthenticationState> GetAuthenticationStateAsync()
             => Task.FromResult(_state);
     }
@@ -105,6 +108,7 @@ public class SitesPageTests : BunitContext
             stale,
             unknown);
 
+    /// <summary>Verifies that loading data fetches all connections in one query rather than one query per site.</summary>
     [Fact]
     public void LoadData_FetchesAllConnectionsInOneQuery_NoPerSiteQueries()
     {
@@ -122,6 +126,7 @@ public class SitesPageTests : BunitContext
         _siteRepo.DidNotReceive().GetDataConnectionsBySiteIdAsync(Arg.Any<int>());
     }
 
+    /// <summary>Verifies that loading data groups connections by site and renders them under their site.</summary>
     [Fact]
     public void LoadData_GroupsConnectionsBySite_AndRendersThem()
     {
@@ -138,6 +143,7 @@ public class SitesPageTests : BunitContext
         Assert.Contains("beta-conn", cut.Markup);
     }
 
+    /// <summary>Verifies that the artifact badge shows Current, Out of date or Never deployed according to the site's artifact state.</summary>
     [Fact]
     public void ArtifactBadge_ShowsCurrent_OutOfDate_NeverDeployed()
     {
@@ -163,6 +169,7 @@ public class SitesPageTests : BunitContext
         });
     }
 
+    /// <summary>Verifies that the instance line shows the stale count out of the deployed count.</summary>
     [Fact]
     public void InstanceLine_ShowsStaleOfDeployed()
     {
@@ -183,6 +190,7 @@ public class SitesPageTests : BunitContext
         });
     }
 
+    /// <summary>Verifies that the instance line uses the correct singular wording when exactly one instance is affected.</summary>
     [Fact]
     public void InstanceLine_PluralisesTheSingleInstanceCase()
     {
@@ -204,6 +212,7 @@ public class SitesPageTests : BunitContext
         });
     }
 
+    /// <summary>Verifies that Re-check forces a refresh of the pending-updates snapshot.</summary>
     [Fact]
     public void Recheck_ForcesRefresh()
     {
@@ -218,6 +227,7 @@ public class SitesPageTests : BunitContext
             _pendingUpdates.Received().GetAsync(true, Arg.Any<CancellationToken>()));
     }
 
+    /// <summary>Verifies that a failure loading sites skips the fleet-wide evaluation.</summary>
     [Fact]
     public void SiteLoadFailure_SkipsTheFleetEvaluation()
     {
@@ -232,6 +242,7 @@ public class SitesPageTests : BunitContext
         _pendingUpdates.DidNotReceive().GetAsync(Arg.Any<bool>(), Arg.Any<CancellationToken>());
     }
 
+    /// <summary>Verifies that a failed re-check clears the stale as-of caption.</summary>
     [Fact]
     public void FailedRecheck_ClearsTheStaleAsOfCaption()
     {
@@ -258,6 +269,7 @@ public class SitesPageTests : BunitContext
         });
     }
 
+    /// <summary>Verifies that a cache fault shows an unavailable state while the sites still render.</summary>
     [Fact]
     public void CacheFault_ShowsUnavailable_AndSitesStillRender()
     {