Added Ruff linting

src/rabbitmq_handler.py

@@ -1,16 +1,18 @@
 import asyncio
+import json
+import os
+import signal
+
 import aio_pika
 from aio_pika.exceptions import AMQPException
-from secret_manager import return_credentials, cleanup_secret_files
-from secret_manager.fernet_encryption import decrypt_token
-from device_token_repository import database_lookup_by_user_id, remove_inactive_push_token, database_lookup_by_uuid
-import os
-from simple_logger_handler import setup_logger
-import json
-from db import db_manager
-from send_notification import send_notification
-import signal
+
 import metrics
+from db import db_manager
+from device_token_repository import database_lookup_by_user_id, database_lookup_by_uuid, remove_inactive_push_token
+from secret_manager import cleanup_secret_files, return_credentials
+from secret_manager.fernet_encryption import decrypt_token
+from send_notification import send_notification
+from simple_logger_handler import setup_logger
 
 logger = setup_logger(__name__)
 
@@ -70,7 +72,7 @@ class RabbitMQConsumer:
 		logger.debug(f"[RabbitMQ] DLQ queue '{self.dlq_queue_name}' declared.")
 
 		metrics.start_metrics_server(port=9000)
-		logger.debug(f"[Metrics] Prometheus metrics server started on port 9000.")
+		logger.debug("[Metrics] Prometheus metrics server started on port 9000.")
 
 		self._metric_tasks = [
 			asyncio.create_task(metrics.update_queue_gauge(self.channel, self.queue_name)),