Documentation writer run for Jaah

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.

Sessions reference page refreshed from prod with six new captures; Changelog and Guides had nothing due; Reference checked with no gaps. Quick gate green. PR #6705 queued to the merge lane. Visual check done: the captures are legible and show no personal data. Memory: used mem-22234, mem-15203; none proposed.