refactor: strip WP-/RB- ticket refs from apps and libs (RD-18)

204 WP-NN/RB-NN comments named a closed ticket instead of the code they
sit next to. git blame already records history and stays correct when
code moves; the comment does not. This sweep removes the reference and
keeps the sentence, across 95 files in apps/ and libs/ plus the
behaviour-spec generator's header text.

Eleven references stay: five story files justify an a11y disable per
the README's rule, and one line in a11y.mdx documents that convention.
Two sentences needed a rewrite, not a deletion, so the reference's
meaning survives its removal. behaviour-spec.mdx is regenerated, not
hand-edited.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/ssp/src/app/registratie/infrastructure/change-request.adapter.ts

@@ -6,7 +6,7 @@ import { Valid } from '@registratie/domain/change-request.machine';
  * Infrastructure adapter for the telefoonwijziging POST (`/api/v1/change-requests`) —
  * the single place the network client lives for contact changes, so the command
  * and the UI never touch `ApiClient`. The BRP address is authoritative and not
- * submitted (WP-34); only the phone number is. Returns the server reference; the
+ * submitted; only the phone number is. Returns the server reference; the
  * server re-validates and is the authority.
  */
 @Injectable({ providedIn: 'root' })