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.Host.Tests/SiteHealthEndpointTests.cs

@@ -29,13 +29,14 @@ public class SiteHealthEndpointTests : IDisposable
     private readonly string _tempDbPath;
     private readonly string _tempAuditDbPath;
 
+    /// <summary>Initializes the test class with temporary database paths and the environment overrides a site node needs to boot.</summary>
     public SiteHealthEndpointTests()
     {
         _tempDbPath = Path.Combine(Path.GetTempPath(), $"scadabridge_health_ep_{Guid.NewGuid()}.db");
         _tempAuditDbPath = Path.Combine(Path.GetTempPath(), $"scadabridge_health_ep_audit_{Guid.NewGuid()}.db");
 
         // Whole-key env overrides, the sanctioned path: supplying GrpcPsk concretely makes the
-        // pre-host secrets expander skip appsettings.Site.json's ${secret:SB-GRPC-PSK-site-1}
+        // pre-host secrets expander skip appsettings.Site.json's ${secret:SB-GRPC-PSK-<siteId>}
         // token, so this test needs no seeded secrets store.
         //
         // The remoting port is moved off the site default (8082) so this fixture cannot collide
@@ -52,7 +53,7 @@ public class SiteHealthEndpointTests : IDisposable
         SetEnv("ScadaBridge__Cluster__SeedNodes__1", "akka.tcp://scadabridge@localhost:18085");
         SetEnv("ScadaBridge__Communication__GrpcPsk", "test-psk-0123456789");
         SetEnv("LocalDb__Path", _tempDbPath);
-        // arch-review remediation WP1.2: SqliteAuditWriterOptions.DatabasePath has no default
+        // SqliteAuditWriterOptions.DatabasePath has no default
         // and StartupValidator now requires it for Site nodes — same reason LocalDb__Path is
         // overridden above (appsettings.Site.json's own default is CWD-relative and would
         // otherwise litter the test working directory when SiteAuditBacklogReporter probes it).
@@ -65,6 +66,7 @@ public class SiteHealthEndpointTests : IDisposable
         Environment.SetEnvironmentVariable(key, value);
     }
 
+    /// <summary>Releases the resources held by this test class.</summary>
     public void Dispose()
     {
         foreach (var d in _disposables)
@@ -109,6 +111,8 @@ public class SiteHealthEndpointTests : IDisposable
         return client;
     }
 
+    /// <summary>Verifies that a site node maps the ready health endpoint with the canonical JSON body.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Site_MapsHealthReady_WithTheCanonicalJsonBody()
     {
@@ -130,6 +134,8 @@ public class SiteHealthEndpointTests : IDisposable
         Assert.False(entries.TryGetProperty("active-node", out _), "active-node belongs to the Active tier");
     }
 
+    /// <summary>Verifies that a site node maps the active health endpoint carrying only the active-node check.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Site_MapsHealthActive_CarryingOnlyTheActiveNodeCheck()
     {
@@ -145,6 +151,8 @@ public class SiteHealthEndpointTests : IDisposable
             entries.EnumerateObject().Select(p => p.Name).ToArray());
     }
 
+    /// <summary>Verifies that the site health endpoints are reachable anonymously.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Site_HealthEndpointsAreAnonymous()
     {