Add Redis storage backend

[vdusek]

Motivation

Crawlee Python already ships a Redis storage backend (RedisStorageClient) using redis[hiredis]. It covers all three storage types — Dataset, KeyValueStore, and RequestQueue — with Lua scripts for atomic operations and support for both exact (set-based) and probabilistic (Bloom filter) request deduplication.

A Redis backend in JS Crawlee would enable distributed crawling, shared state across processes/machines, and better scalability for high-throughput workloads.

Scope

• Implement a Redis-based storage client for JS Crawlee covering Dataset, KeyValueStore, and RequestQueue.
• Port the Lua scripts for atomic fetch, add, and stale request reclaim operations.
• Support configurable deduplication strategies (Redis sets vs Bloom filters).

Blockers

• Rework the storage client system #3075 — The storage client system needs to be reworked first to simplify the interface that new backends must implement.

Python reference

• Source: src/crawlee/storage_clients/_redis/
• Lua scripts: lua_scripts/
• Storage client rework PR: refactor!: Introduce new storage client system crawlee-python#1194