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/ConfigSecretsTests.cs

@@ -4,7 +4,7 @@ using System.Text.Json;
 namespace ZB.MOM.WW.ScadaBridge.Host.Tests;
 
 /// <summary>
-/// Host-003 regression: secrets must not be committed in plaintext in the
+/// Regression: secrets must not be committed in plaintext in the
 /// shipped <c>appsettings.Central.json</c>. Connection-string passwords, the LDAP
 /// service-account password and the JWT signing key must be supplied via
 /// environment variables (or another secret store) at deployment time — the
@@ -35,6 +35,7 @@ public class ConfigSecretsTests
         return doc.RootElement.GetProperty("ScadaBridge").Clone();
     }
 
+    /// <summary>Verifies that the central config's connection strings contain no plaintext password.</summary>
     [Fact]
     public void CentralConfig_ConnectionStrings_ContainNoPlaintextPassword()
     {
@@ -58,10 +59,11 @@ public class ConfigSecretsTests
         }
     }
 
+    /// <summary>Verifies that the central config does not commit the LDAP service-account password.</summary>
     [Fact]
     public void CentralConfig_LdapServiceAccountPassword_IsNotCommitted()
     {
-        // Task 1.4 cutover: the LDAP service-account password moved out of the flat
+        // Cutover: the LDAP service-account password moved out of the flat
         // Security:LdapServiceAccountPassword key into the nested Security:Ldap
         // sub-section (Security:Ldap:ServiceAccountPassword), bound to the shared
         // ZB.MOM.WW.Auth LdapOptions. Walk into Security:Ldap and guard the nested
@@ -78,6 +80,7 @@ public class ConfigSecretsTests
         }
     }
 
+    /// <summary>Verifies that the central config does not commit the JWT signing key.</summary>
     [Fact]
     public void CentralConfig_JwtSigningKey_IsNotCommitted()
     {