docs(comments): strip internal task/milestone/bundle bookkeeping from code comments

Remove project bookkeeping citations from shipped code comments across the
solution: hyphenated task IDs (WP-14, StoreAndForward-025), milestone/task/
issue refs (M3, Task 4, Audit Log #23, #21), Bundle X task-bundle labels,
and C/D/K/S/T phase labels.

Comment text only — no code logic, string/log literals, or XML-doc structure
changed. Genuine descriptions are preserved (only the citation is stripped),
and technical lookalikes are retained (UTF-8, SHA-256, T00:00:00, M365,
UTC-5, pre-C4/pre-C5 schema versions). Flagged by the new CommentChecker
TaskReferenceInComment / TrackingReferenceInComment checks plus targeted
grep passes; full solution builds clean, append-only guard tests pass.

src/ZB.MOM.WW.ScadaBridge.KpiHistory/KpiHistoryRecorderActor.cs

@@ -8,7 +8,7 @@ using ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Repositories;
 namespace ZB.MOM.WW.ScadaBridge.KpiHistory;
 
 /// <summary>
-/// Central cluster-singleton (M6 "KPI History &amp; Trends", K4) that drives the
+/// Central cluster-singleton ("KPI History &amp; Trends") that drives the
 /// KPI sampling backbone. On a periodic timer (default 60 s) it:
 /// <list type="number">
 /// <item>Stamps a single <c>capturedAtUtc</c> for the pass.</item>
@@ -46,10 +46,10 @@ namespace ZB.MOM.WW.ScadaBridge.KpiHistory;
 /// async connection cleanup does not block.
 /// </para>
 /// <para>
-/// <b>Singleton wiring.</b> The <c>Props</c> is built in the Host (K5) on the
+/// <b>Singleton wiring.</b> The <c>Props</c> is built in the Host on the
 /// active central node with the constructor args resolved from DI — this actor
 /// has no knowledge of <c>Akka.Cluster.Tools</c>, mirroring the Notification
-/// Outbox (#21) singleton split.
+/// Outbox singleton split.
 /// </para>
 /// </remarks>
 public class KpiHistoryRecorderActor : ReceiveActor, IWithTimers