A full-featured 2-layer (mem-redis) cache implementation.

• Cache penetration protection: empty values can also be cached.
• Cache breakdown: single-query-in-flight.
• Redis network IO pressure: memory cache with Redis queue events for invalidation.
• Compression
• Prometheus
• OpenTelementry

• For `go-redis/v8` users, please use `v0.1.x`.
• For `go-redis/v9` users, use `v0.2.x`