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.InboundAPI/EndpointExtensions.cs

@@ -151,7 +151,7 @@ public static class EndpointExtensions
         // "Echo" does not grant "echo". This is the intended invariant: method
         // names are case-sensitive identifiers, and a key's granted scopes must be
         // provisioned with the exact casing of the methods they authorize.
-        // WP2.6b: the per-request repository round-trip is fronted by a short-TTL
+        // The per-request repository round-trip is fronted by a short-TTL
         // ApiMethodCache (invalidated by name on an ApiMethod ScriptArtifactsChanged
         // notification, and self-healing via TTL expiry otherwise — see ApiMethodCache
         // and ScriptArtifactChangeSubscriber). Only reached after the in-scope check