Fixes: 1) Extract and centralize broker transport options in `settings/celery.py`; 2) Remove redundant Celery settings from `celery.py`.
Extra: 1) Cleanup and streamline Celery configuration in `celery.py`.
Fixes: 1) Update Celery worker configuration in `worker-entrypoint.sh` to optimize worker pool and task limits;
Extra: Refactor `docker-compose.yml` and scripts for improved service management.