Documentation writer batch production cycle

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 run: Model accounts page refreshed on prod (Import/Export, 9 shots), v1.2.3920 changelog (4 new bullets), credentials cursor paging in Pagination; Guides not due. Quick gate + docs build green; PR #6758 queued to the merge lane. Memory: used mem-15203; proposed none.