Write and release documentation updates

Docs-writer run. Follow apps/docs/WRITER.md on develop. Do each item that is due, all in ONE PR: 1. Screens: one console feature's reference page. 2. Guides: one Get started, Using Jaah or FAQ item. 3. Changelog: the next batch of prod promotions 4. Reference: the Jaah API and Real-time reference against the code. Sign in only through the capture helper. Nothing due: end with no PR.

Docs-writer: Compliance reference re-verified on prod (14 shots retaken, L0 clarified); API/Real-time checked, no gap; Guides and Changelog not due. Quick gate green, visual check clean; PR #7969 queued to the merge lane. Memory: none applied.