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/InboundApiKeyStoreOptionsTests.cs

@@ -11,6 +11,7 @@ public class InboundApiKeyStoreOptionsTests
             .Build();
     }
 
+    /// <summary>Verifies that the key store provider defaults to SQLite.</summary>
     [Fact]
     public void Provider_DefaultsToSqlite()
     {
@@ -21,6 +22,9 @@ public class InboundApiKeyStoreOptionsTests
         Assert.Equal(InboundApiKeyStoreProvider.Sqlite, InboundApiKeyStoreOptions.ReadProvider(configuration));
     }
 
+    /// <summary>Verifies that the provider name is parsed case-insensitively.</summary>
+    /// <param name="value">The configured provider text.</param>
+    /// <param name="expected">The provider the text should resolve to.</param>
     [Theory]
     [InlineData("sqlserver", InboundApiKeyStoreProvider.SqlServer)]
     [InlineData("SQLSERVER", InboundApiKeyStoreProvider.SqlServer)]
@@ -36,6 +40,8 @@ public class InboundApiKeyStoreOptionsTests
         Assert.Equal(expected, InboundApiKeyStoreOptions.ReadProvider(configuration));
     }
 
+    /// <summary>Verifies that an unknown provider value is rejected.</summary>
+    /// <param name="value">The unsupported provider text.</param>
     [Theory]
     [InlineData("Postgres")]
     [InlineData("7")]
@@ -52,6 +58,7 @@ public class InboundApiKeyStoreOptionsTests
         Assert.Contains("SqlServer", ex.Message);
     }
 
+    /// <summary>Verifies that the import-from-SQLite path setting binds from configuration.</summary>
     [Fact]
     public void Binds_ImportFromSqlitePath()
     {