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.
