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/Services/AuditTreeScopeTests.cs

@@ -11,6 +11,8 @@ namespace ZB.MOM.WW.ScadaBridge.CentralUI.Tests.Services;
 
 public class AuditTreeScopeTests
 {
+    /// <summary>Verifies that the production tree read resolves a fresh caller scope on every call.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task ProductionTreeRead_UsesFreshCallerScope_EveryTime()
     {
@@ -32,7 +34,9 @@ public class AuditTreeScopeTests
 
     private sealed class ChangingAuth : AuthenticationStateProvider
     {
+        /// <summary>Gets or sets the site id claim that the next authentication state carries.</summary>
         public string Site { get; set; } = "42";
+        /// <inheritdoc />
         public override Task<AuthenticationState> GetAuthenticationStateAsync() => Task.FromResult(new AuthenticationState(
             new ClaimsPrincipal(new ClaimsIdentity(new[] {
                 new Claim(JwtTokenService.RoleClaimType, Roles.Viewer),