tools.totp_tools module
Per-user TOTP (time-based one-time password) accounts.
Secrets are stored in Redis encrypted with the same stack as API keys
(api_key_encryption: per-user keys in SQLite, API_KEY_MASTER_KEY).
Redis: stargazer:user_totp:{user_id} — hash field = account label,
value = encrypted JSON with secret (base32) and optional metadata.