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.CentralUI/Services/IKpiSnapshotCache.cs

@@ -6,7 +6,7 @@ namespace ZB.MOM.WW.ScadaBridge.CentralUI.Services;
 
 /// <summary>
 /// Process-level memoized point-in-time KPI snapshots shared by every Blazor circuit on
-/// this node (arch-review WP2.4, finding #8 — the per-circuit polling half).
+/// this node (the per-circuit polling half).
 /// <para>
 /// Every KPI here is a <em>global, point-in-time aggregate</em>: it does not vary by user,
 /// site scope, or role, so N circuits asking for it inside one refresh window are asking