[help wanted] Add RedisMemoryStore backend

[Carlos-Projects]

Task

Implement a Redis-backed MemoryStore for production deployments.

What to do

• Create memmark/store/redis_store.py
• Implement RedisMemoryStore extending MemoryStore interface
• Support connection pooling, key prefixes, TTL
• Add connection error handling
• Add tests with fakeredis or a test Redis instance

Skills needed

• Python, Redis (redis-py library)
• Understanding of MemMark MemoryStore interface

Acceptance criteria

• RedisMemoryStore passes all MemoryStore interface tests
• Works with default Redis config (localhost:6379)
• Graceful error handling on connection failure
• All tests pass and lint is clean

See CONTRIBUTING.md.

[renyzbr-hash]

Hi, I'd like to work on this RedisMemoryStore implementation.

Before I start, is there a bounty or compensation attached to this issue? The task involves implementing connection pooling, key prefixes, TTL, error handling, and full test coverage — roughly 2-3 hours of focused work. I'd like to confirm the reward structure before committing a full PR.

Happy to proceed if there's a fair bounty. Let me know!