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.Transport/Serialization/EntityDtos.cs

@@ -256,7 +256,7 @@ public sealed record ExternalSystemDto(
     TimeSpan RetryDelay,
     IReadOnlyList<ExternalSystemMethodDto> Methods,
     SecretsBlock? Secrets,
-    // Per-system HTTP round-trip timeout (arch-review 2026-08-19 P7-1, row-27 shape).
+    // Per-system HTTP round-trip timeout (arch-review 2026-08-19).
     // Additive trailing field; null distinguishes a bundle written before this field
     // existed from a bundle that explicitly carries the entity's own "0 = unset"
     // sentinel. BundleImporter treats a null incoming value as "not specified by this