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/SiteLocalDbAutoVacuumTests.cs

@@ -6,7 +6,7 @@ using ZB.MOM.WW.LocalDb;
 namespace ZB.MOM.WW.ScadaBridge.Host.Tests;
 
 /// <summary>
-/// Arch-review 2026-08-19 P4-6 — <c>PRAGMA auto_vacuum = INCREMENTAL</c> only takes effect on
+/// <c>PRAGMA auto_vacuum = INCREMENTAL</c> only takes effect on
 /// a table-less database, and <c>SqliteLocalDb</c>'s constructor creates LocalDb's own
 /// bookkeeping tables before anything else ever gets a connection to the consolidated site
 /// file. <see cref="SiteLocalDbSetup.EnsureAutoVacuumOnFreshFile"/> is the fix: it pre-creates
@@ -23,6 +23,7 @@ namespace ZB.MOM.WW.ScadaBridge.Host.Tests;
 /// </remarks>
 public class SiteLocalDbAutoVacuumTests
 {
+    /// <summary>Verifies that a fresh file reports incremental auto-vacuum.</summary>
     [Fact]
     public void FreshFile_ReportsIncrementalAutoVacuum()
     {
@@ -43,6 +44,7 @@ public class SiteLocalDbAutoVacuumTests
         }
     }
 
+    /// <summary>Verifies that incremental auto-vacuum survives LocalDb creating its own bookkeeping tables afterward.</summary>
     [Fact]
     public void FreshFile_AutoVacuumSurvives_LocalDbCreatingItsOwnBookkeepingTablesAfterward()
     {
@@ -82,6 +84,7 @@ public class SiteLocalDbAutoVacuumTests
         }
     }
 
+    /// <summary>Verifies that an existing file is left alone and its auto-vacuum stays none.</summary>
     [Fact]
     public void ExistingFile_IsLeftAlone_AutoVacuumStaysNone()
     {
@@ -118,6 +121,7 @@ public class SiteLocalDbAutoVacuumTests
         }
     }
 
+    /// <summary>Verifies that a missing LocalDb path does not throw.</summary>
     [Fact]
     public void MissingLocalDbPath_DoesNotThrow()
     {