Record onboarding UX and analytics delivery

docs/ux/auth-journeys.md

@@ -145,3 +145,7 @@ packages; the web build passes. Browser walkthrough at 390px covers internal-err
 hierarchy, secondary email recovery, actual Tab/Enter submission, and the demo
 sent screen. The heading is exposed as a live accessibility heading. Recipient
 text uses a normal text node to remain exposed to assistive technology.
+
+Delivered in [PR #13](https://git.sendico.io/tech/sxchnge/pulls/13), branch
+`onboarding-12`. The final browser accessibility tree exposes the recipient text,
+demo status, status heading and recovery actions. PR is open for review.