Admin login-lock reset now SCANs and clears all auth:login:* keys (any
scope) and surfaces redis_deleted_keys / fallback_deleted_keys back to
ops-web so the operator can tell whether the cache was actually hit.
Also tracks paired keys via a per-identifier index plus an unlock marker
so legacy/in-flight pair locks get cleared on the next acquire.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Introduce a Redis-backed LoginGuard that combines per-IP, per-identifier
and IP+identifier rate limits, exponential lockout on consecutive failures,
and a concurrent-attempt lock so a single subject cannot pile up parallel
brute-force tries. The guard ships with an in-memory fallback when Redis
is unreachable so login protection keeps working under degraded mode.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
root