- Removed `flake8` and `flake8-annotations` from dependencies, replaced by `ruff` for linting.
- Introduced cleaner type hinting and modern Python annotations (PEP 604 style) across multiple modules.
- Moved archive processing to a dedicated helper (`comic.archives`) for improved maintainability.
- Updated and simplified logic for archive file retrieval, directory cleaning, and user access validation.
- Improved error handling and added support for user classification restrictions in API responses.
- Skip page count assignment for corrupt or incompatible archives in comic processing.
- Update `Dockerfile` to append crontab entries to `/etc/crontab` instead of `/etc/cron.daily/cbreader`.
- Modify crontab entry to use the virtual environment's Python binary and include the `root` user for execution.