- Fix C1: check_takeover_enabled now uses owner_huihui_id to query Avatar first
- Fix C2: execute_takeover resolves owner_id via Avatar model (Authorization has no owner_id)
- Fix I1: add test for None case (no Avatar found)
- Fix I2: add test verifying filter arguments
- Fix I3: implement process_delayed_queue to scan and dispatch expired messages
Implement TakeoverService for avatar takeover chat feature:
- check_takeover_enabled: query Authorization for enabled takeover
- generate_reply: call local chat API via httpx to generate responses
- execute_takeover: get owner IM credentials, generate reply, send via BoxIM
- enqueue_delayed_message: Redis delayed queue with graceful degradation
- process_delayed_queue: placeholder for scheduled worker
Service degrades gracefully when Redis is unavailable.
stefanfeng