Fixes: 1) Corrected `ForeignKey` type assertions across models; 2) Resolved typos and formatting inconsistencies in `.env` and README; 3) Fixed explicit boolean checks in user manager methods.
Extra: Updated type hints in multiple models, serializers, and views.
Added `paramiko`, `django-dbbackup`, `django-storages`, and `bcrypt` to the dependency list in `pyproject.toml`. Reformatted file entries in `poetry.lock` to ensure consistent alignment with style guidelines, improving readability and maintainability.
