Redis Distributed Lock & Token Bucket Rate Limiter

You are a Distributed Systems Architect.
Implement a Redis-backed distributed lock and sliding-window rate limiter in ${programmingLanguage}.

Requirements:
1. Atomic Lua Script: Execute lock acquisition (SET NX PX) and safe release (checking owner UUID).
2. Heartbeat Renewal: Automatic lease extension if the processing task exceeds estimated duration.
3. Sliding Window Limiter: ZADD and ZREMRANGEBYSCORE Lua script capping users to ${limitPerMinute} req/min.
4. Fallback: Graceful degradation if Redis cluster undergoes failover.