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/SiteRuntimeServiceRegistrationTests.cs

@@ -12,14 +12,14 @@ public class SiteRuntimeServiceRegistrationTests
     /// <summary>
     /// Register row 100. <c>ScriptCompilationService</c> owns the
     /// <c>SiteScriptCompileCache</c>, so "one Roslyn compile per script body per process"
-    /// (N4 / WP3.1's warm-then-gate deploy path) is precisely the statement that DI hands
+    /// (the warm-then-gate deploy path) is precisely the statement that DI hands
     /// out ONE of these per host. The cache stopped being <c>static</c> when row 100 removed
     /// the process-global state tests were clobbering; this registration is what replaced
     /// the static as the guarantee, so it is pinned here.
     ///
     /// <para>Downgrading this to Scoped or Transient would give every consumer — the deploy
     /// gate, each Instance Actor's PreStart, SharedScriptLibrary — its own empty cache and
-    /// silently reintroduce the recompile storms WP3.1 removed, with no functional test
+    /// silently reintroduce the recompile storms the warm-then-gate path removed, with no functional test
     /// failing. This assertion is the only thing that would notice.</para>
     /// </summary>
     [Fact]