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.Transport.IntegrationTests/Import/CreateMissingSiteRelationalTests.cs

@@ -33,6 +33,7 @@ public sealed class CreateMissingSiteRelationalTests : IDisposable
     private readonly SqliteConnection _connection;
     private readonly ServiceProvider _provider;
 
+    /// <summary>Initializes the test class with a temporary database.</summary>
     public CreateMissingSiteRelationalTests()
     {
         // One open in-memory SQLite connection for the fixture's lifetime — the
@@ -69,12 +70,15 @@ public sealed class CreateMissingSiteRelationalTests : IDisposable
         scope.ServiceProvider.GetRequiredService<ScadaBridgeDbContext>().Database.EnsureCreated();
     }
 
+    /// <summary>Releases the resources held by the test fixture.</summary>
     public void Dispose()
     {
         _provider.Dispose();
         _connection.Dispose();
     }
 
+    /// <summary>Verifies that importing with create-missing for a site and connection wires the materialized site id.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Import_create_missing_site_and_connection_wires_the_materialised_site_id()
     {