docs(src): fix CommentChecker findings across src/ — 1,032 → 5 (all false positives)

Comment/XML-doc changes only, no code logic:
- strip project-tracking references (WP*, P*-*, row-NN, #NN, Task N) from
  comments, keeping the explanatory rationale
- add missing summaries, <param>, <returns>, <typeparam> and <inheritdoc/>
- replace misused <inheritdoc/> with real docs; where <inheritdoc/> was
  combined with useful remarks, move the rationale into // comments
- drop stale replicationActor <param> on DeploymentManagerActor ctor

Remaining 5 are false positives (CWE-1236 x2, failures-1, year-0001, M365).
Build 0 errors / 0 warnings.

src/ZB.MOM.WW.ScadaBridge.SiteRuntime/Tracking/OperationTrackingOptions.cs

@@ -10,7 +10,7 @@ public class OperationTrackingOptions
     /// MIGRATION-ONLY as of LocalDb Phase 1. <see cref="OperationTrackingStore"/> no longer
     /// reads this: the tracking table lives in the consolidated site database at
     /// <c>LocalDb:Path</c>. The only remaining consumer is
-    /// <c>SiteLocalDbLegacyMigrator</c>, which uses it to locate a pre-Phase-1
+    /// <c>SiteLocalDbLegacyMigrator</c>, which uses it to locate a pre-LocalDb
     /// <c>site-tracking.db</c> and copy it in once. Safe to delete from a config once that
     /// node's migration has run.
     /// </summary>

src/ZB.MOM.WW.ScadaBridge.SiteRuntime/Tracking/OperationTrackingStore.cs

@@ -278,6 +278,8 @@ public class OperationTrackingStore : IOperationTrackingStore, IAsyncDisposable,
     /// take this barrier implicitly; it is public for callers that go around the
     /// store to the file (tests, tooling) and for anyone who wants "durable now".
     /// </summary>
+    /// <param name="ct">Token to cancel the wait.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     public Task FlushAsync(CancellationToken ct = default) => WaitForQueuedWritesAsync(ct);
 
     /// <summary>Queues a lifecycle write and returns once it is queued (not applied).</summary>