Refactor project structure and remove obsolete files

- Deleted the Makefile, `README_TESTING.md`, and several deployment scripts to streamline the project.
- Updated `.dockerignore` to exclude unnecessary development files.
- Adjusted database schema comments for clarity.
- Refactored metrics handling in middleware for improved command extraction and logging.
- Enhanced command mappings for buttons and callbacks in constants for better maintainability.
- Start refactor voice bot

helper_bot/handlers/admin/admin_handlers.py

@@ -343,7 +343,7 @@ async def test_metrics_handler(
         await message.answer(
             f"✅ Тестовые метрики записаны\n"
             f"📊 Активных пользователей: {active_users}\n"
-            f"🔧 Проверьте Grafana дашборд"
+            f"🔧 Проверьте Prometheus метрики"
         )
         
     except Exception as e: