migration 0029: app_user_password_resets table — same shape as
verification (token_hash PK, app_id + user_id FKs, expires_at,
consumed_at). One-shot via atomic UPDATE WHERE consumed_at IS NULL.
Default TTL 1h (shorter than verification's 48h — reset tokens are
higher-risk).
UsersServiceImpl gains password_resets: Arc<dyn AppUserPasswordResetRepo>.
users::request_password_reset(email, opts):
* Returns Ok(()) regardless of whether the email matched — no
existence-leak signal in script-land (per brief).
* Email-not-configured surfaces as NotConfigured so scripts can
fall back to a synchronous reset path. Other email errors are
silently swallowed and logged server-side; surfacing them would
leak which addresses produced a "real send attempted" signal vs
a no-op.
users::complete_password_reset(token, new_password):
* Atomically consumes the token, updates the Argon2id hash, and
revokes EVERY active session for that user (anyone with a stale
token shouldn't be able to ride out the reset). Emits
users::password_changed.
* Returns the user on success, () on bad/expired/already-used.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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