Fixes: 1) Update model type references from `payments.models.Transaction` to `engine.payments.models.Transaction`; 2) Update model type references from `core.models.Order` to `engine.core.models.Order`;
Extra: Consistent namespace fix across multiple files; no functional changes.
Fixes: 1) Remove deprecated Jazzmin configuration and replace with unfold dependencies; 2) Update DRF API title to use new PROJECT_NAME; 3) Fix import order and remove unused imports in core/viewsets.py;
Extra: 1) Add PROJECT_NAME to base settings; 2) Update INSTALLED_APPS to include unfold-related apps; 3) Clean up unused config references.
Fixes: 1) Fix missing import for `send_message` moved to method scope in Telegram message handler; 2) Correct Swagger UI socket connection setting to `False`.
Extra: 1) Minor code cleanup and reformatting in viewsets and settings.
Fixes: 1) Add missing import for `settings` in multiple modules;
Extra: 1) Remove unused `SerializerMethodField` from serializers; 2) Update `RELEASE_DATE` to align with new version; 3) General cleanup and consistency adjustments.
