v1.1.0: Replace Redis and SimpleCache implementations with Memoize.

Simplified caching logic by replacing RedisCache and SimpleCache with a new Memoize-based implementation backed by an in-memory cache. Updated tests and examples to reflect the new design. This refactor improves maintainability and reduces external dependencies.

Refactor caching system and replace in-memory cache with Redis

Replaced in-memory `MemCache` with Redis-backed `RedisCache` to improve scalability and persistence. Updated tests to reflect the new Redis implementation using mock Redis clients. Enhanced example usage with concurrency support and implemented an LRU-based caching strategy for local caching.