Fixes: 1) Remove unnecessary wildcard imports in settings files; 2) Add missing imports for `getenv`, `DEBUG`, and other constants; 3) Fix logger usage in middleware to align with `django.request`.
Extra: 1) Refactor settings files for readability and consistency; 2) Remove outdated `noqa` comments; 3) Minor formatting adjustments.
Fixes: 1) Remove unused `GrapheneLocaleMiddleware` and `CustomLocaleCommonMiddleware` from middleware stack; 2) Remove unused `get_language_from_header` import and related translation logic;
Extra: 1) Clean up settings and middleware files by removing redundant locale handling logic; 2) Minor formatting adjustments for consistency.
