- Rename CELERY_BROKER and CELERY_BACKEND to REDIS_DB_CELERY_BROKER and REDIS_DB_CELERY_BACKEND to avoid Celery CLI prefix matching hijacking
- Build canonical broker and backend URLs and force them into os.environ to prevent override by stray environment variables
- Add logging for Celery app initialization with sanitized connection details
- Update celery_app.py to use pre-built URL variables instead of inline construction
- Add documentation reference to celery-env-bug-report.md explaining the environment variable naming convention
- Prevents Celery CLI's Click framework from intercepting broker/backend configuration through environment variables
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