Fixes: 1) Adjust import order in `core/models.py` for better consistency;
Extra: Refactor formatting for better readability in `core/models.py`; Update `pyproject.toml` version to 2.6.2; Update compiled translation file `cs_CZ/LC_MESSAGES/django.mo`.
1) None;
Fixes:
1) Corrected formatting of "fuzzy" flags in multiple locale `.po` files for consistent syntax;
Extra:
1) No functional changes, only formatting updates in translation files;
