chore(api/libs): Apply ruff format. (#7301)

api/libs/exception.py

@@ -4,7 +4,7 @@ from werkzeug.exceptions import HTTPException
 
 
 class BaseHTTPException(HTTPException):
-    error_code: str = 'unknown'
+    error_code: str = "unknown"
     data: Optional[dict] = None
 
     def __init__(self, description=None, response=None):
@@ -14,4 +14,4 @@ class BaseHTTPException(HTTPException):
             "code": self.error_code,
             "message": self.description,
             "status": self.code,
-        }
+        }