Async Streaming: Converted key methods (fill_buffer, stream_content, close, get_stream_link, head_playback) to async for non-blocking streaming and improved scalability.
🔄 Unified Stremthru: Full refactor with dynamic STORE_CODE_TO_NAME / STORE_NAME_TO_TOKEN_KEY mappings and propagation of store_name in all requests (add_magnet, unrestrict_link, etc.). Updated RealDebrid to delegate via Stremthru.
💾 Cache Persistence: Store valid Stremthru links in Redis (stremthru:working:{store_code}:{info_hash}, TTL 7 days) and leverage this cache to mark links as "working" even on cached results.
