Second P1 growth engine: compare two profiles, gate full tips behind
deep-access mock payment, and list personal archives on /profile.
Co-authored-by: Cursor <cursoragent@cursor.com>
Add host-first environment contracts (Local vs CI vs Prod), deps-only
compose, and the Profile → Portrait → deep-access mock payment slice
with device identity and auto-migrate on API startup.
Co-authored-by: Cursor <cursoragent@cursor.com>