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/application/draft-sync.spec.ts

@@ -96,7 +96,7 @@ describe('createDraftSync', () => {
       expect(r.ok).toBe(false);
     });
 
-    it('recovers from a create conflict by adopting the existing Concept (WP-35)', async () => {
+    it('recovers from a create conflict by adopting the existing Concept', async () => {
       // Server enforces one Concept per type: a stale/cross-tab create is rejected (409),
       // and ensureId adopts the existing Concept from the list instead of erroring.
       const create = vi.fn().mockRejectedValue({ status: 409 });