Add PATCH contact for missing peer IDs, contacts banner and edit UI,
enrich /demo with pairing steps, and update tester/signup guidance.
Co-authored-by: okuma <o0kuma@users.noreply.github.com>
Record invite/metrics/dashboard/draft(no_key) checks, pg_dump restore
rehearsal, and tester-facing guide for msn.iykyka.com.
Co-authored-by: okuma <o0kuma@users.noreply.github.com>