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.AuditLog/Central/AuditLogPurgeActor.cs

@@ -18,8 +18,8 @@ namespace ZB.MOM.WW.ScadaBridge.AuditLog.Central;
 ///       than <c>DateTime.UtcNow - RetentionDays</c>.</item>
 /// <item>For each eligible boundary, calls
 ///       <see cref="IAuditLogRepository.SwitchOutPartitionAsync"/>, a
-///       metadata-only staging-table switch (WP2.2 removed the index
-///       drop/rebuild that used to bracket it).</item>
+///       metadata-only staging-table switch (no index
+///       drop/rebuild brackets it).</item>
 /// <item>Publishes <see cref="AuditLogPurgedEvent"/> on the actor-system
 ///       EventStream so the central health collector + ops surfaces
 ///       can subscribe without coupling to this actor.</item>