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.NotificationOutbox/ServiceCollectionExtensions.cs

@@ -80,10 +80,10 @@ public static class ServiceCollectionExtensions
         services.AddScoped<INotificationDeliveryAdapter>(
             sp => sp.GetRequiredService<SmsNotificationDeliveryAdapter>());
 
-        // KPI history (M6): the recorder singleton enumerates every IKpiSampleSource each
+        // KPI history: the recorder singleton enumerates every IKpiSampleSource each
         // sampling pass to snapshot the outbox delivery KPIs into the central history store.
         // TryAddEnumerable is idempotent — no double-registration if AddNotificationOutbox
-        // is ever called more than once, matching the AuditLog (K8) idiom.
+        // is ever called more than once, matching the AuditLog idiom.
         services.TryAddEnumerable(ServiceDescriptor.Scoped<IKpiSampleSource, NotificationOutboxKpiSampleSource>());
 
         return services;