Closes the forgot-login-password gap. A per-profile recovery question + answer lets
a locked-out user reset their own password.
- DB: additive recovery_question + recovery_answer_hash columns (idempotent
migration). set/get-question/verify/has methods; answer is hashed (pbkdf2) and
matched forgivingly (trim + lowercase + collapse whitespace). No recovery set →
never verifies.
- Endpoints (allowlisted in the login gate so they work pre-auth):
GET /api/auth/recovery-question?username= (generic 404 when absent),
POST /api/auth/recovery-reset {username, answer, new_password} — brute-force
limited; a correct answer sets the new password + authenticates the session.
POST /api/profiles/<id>/set-recovery (admin or self) to configure it.
Tests: set/get/verify, forgiving match, hashed-not-plaintext, no-recovery-never-
verifies, full reset flow (wrong answer rejected + password intact; correct answer
resets), unknown-user 404. 25 tests pass. Next: the Settings + login-screen UI.
613688a9ad