Fix lint errors

src/capa_de_integracion/routers/notification.py

@@ -1,3 +1,5 @@
+"""Notification router for processing push notifications."""
+
 import logging
 from typing import Annotated
 
@@ -31,6 +33,7 @@ async def process_notification(
 
     Args:
         request: External notification request with text, phone, and parameters
+        notification_manager: Notification manager service instance
 
     Returns:
         None (204 No Content)
@@ -46,9 +49,9 @@ async def process_notification(
         # Match Java behavior: process but don't return response body
 
     except ValueError as e:
-        logger.error(f"Validation error: {e!s}", exc_info=True)
-        raise HTTPException(status_code=400, detail=str(e))
+        logger.exception("Validation error")
+        raise HTTPException(status_code=400, detail=str(e)) from e
 
     except Exception as e:
-        logger.error(f"Error processing notification: {e!s}", exc_info=True)
-        raise HTTPException(status_code=500, detail="Internal server error")
+        logger.exception("Error processing notification")
+        raise HTTPException(status_code=500, detail="Internal server error") from e