Upgrade `multidict` package version to 6.7.1 for compatibility and resolve potential dependency issues. Removed `celery-prometheus-exporter` as it is no longer required.
Fixes: 1) Update worker entrypoints to adjust prefetch multiplier and memory/task limits for optimized resource usage.
Extra: 1) Refactor Celery settings into a dedicated file for improved organization and maintainability; 2) Adjust Docker entrypoints to align with updated task configurations; 3) Register `orjson` serializer in a separate module for cleaner code structure.
Fixes: 1) Correct entrypoint scripts by removing redundant `python` reference in `uv run` commands; 2) Resolve incorrect imports and adjust class renaming in vibes_auth tests; 3) Address typing errors and minor omissions in existing code.
Extra: 1) Improve formatting in settings and middleware files; 2) Update messaging test class names for clarity; 3) Cleanup unused imports and extra whitespaces, ensuring cleaner codebase.
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.
Fixes: 1) Fix shebangs in Docker entry-point scripts to use `/usr/bin/bash`.
Extra: 1) Refactor slug fields in `core` migrations for `Brand`, `Category`, and `Product`; 2) Cleanup and simplify admin code in `core/admin.py`.
