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.SiteRuntime.Tests/Actors/HandshakeResetEchoTests.cs

@@ -15,7 +15,7 @@ using ZB.MOM.WW.ScadaBridge.TestSupport;
 namespace ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests.Actors;
 
 /// <summary>
-/// Gitea #36 end-to-end over the REAL <see cref="InstanceActor"/> waiter and DCL ingest path:
+/// End-to-end test over the REAL <see cref="InstanceActor"/> waiter and DCL ingest path:
 /// the cache still holds the previous run's <c>CompleteFlag = True</c>, the script's reset
 /// write has NOT echoed back yet. The legacy overload fast-paths on the stale value (the
 /// defect, pinned as documentation); the reset-aware overload holds the batch + trigger until
@@ -33,6 +33,7 @@ public class HandshakeResetEchoTests : TestKit, IDisposable
     private readonly SharedScriptLibrary _sharedScriptLibrary;
     private readonly TestLocalDb _localDb;
 
+    /// <summary>Initializes the test with a temporary LocalDb-backed site storage and script compilation services.</summary>
     public HandshakeResetEchoTests()
     {
         _localDb = TestLocalDb.CreateTemp("handshake-reset-echo");
@@ -42,6 +43,7 @@ public class HandshakeResetEchoTests : TestKit, IDisposable
         _sharedScriptLibrary = new SharedScriptLibrary(_compilationService, NullLogger<SharedScriptLibrary>.Instance);
     }
 
+    /// <inheritdoc />
     void IDisposable.Dispose()
     {
         // TestKit teardown first, so no in-flight actor can reach a disposed ILocalDb;
@@ -90,6 +92,7 @@ public class HandshakeResetEchoTests : TestKit, IDisposable
     /// cache — callers migrate to the reset-aware overload instead. Never "fix" the fast-path in
     /// place; delete this test only if the legacy overload itself is removed.
     /// </summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task LegacyOverload_FastPathsOnThePreviousRunsCachedTrue()
     {
@@ -106,6 +109,8 @@ public class HandshakeResetEchoTests : TestKit, IDisposable
         Assert.True(await call);
     }
 
+    /// <summary>Verifies that the reset-aware overload holds the batch until the reset echoes and then matches the fresh true value.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task ResetAwareOverload_HoldsTheBatchUntilTheResetEchoes_ThenMatchesTheFreshTrue()
     {
@@ -151,6 +156,8 @@ public class HandshakeResetEchoTests : TestKit, IDisposable
         Assert.Equal("Good", result.Quality);
     }
 
+    /// <summary>Verifies that the reset-aware overload times out in the reset phase when no echo arrives and never writes the batch.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task ResetAwareOverload_NoEcho_TimesOutInResetPhase_AndNeverWritesTheBatch()
     {