Format.

backend/app/chatbot.py

@@ -1,11 +1,12 @@
 from typing import Annotated, List
 
-from app.message_types import add_messages_liberal
 from langchain_core.language_models.base import LanguageModelLike
 from langchain_core.messages import BaseMessage, SystemMessage
 from langgraph.checkpoint import BaseCheckpointSaver
 from langgraph.graph.state import StateGraph
 
+from app.message_types import add_messages_liberal
+
 
 def get_chatbot_executor(
     llm: LanguageModelLike,

backend/app/message_types.py

@@ -6,7 +6,7 @@
     MessageLikeRepresentation,
     ToolMessage,
 )
-from langgraph.graph.message import add_messages, Messages
+from langgraph.graph.message import Messages, add_messages
 
 
 class LiberalFunctionMessage(FunctionMessage):

backend/app/upload.py

@@ -12,8 +12,8 @@
 import os
 from typing import BinaryIO, List, Optional
 
-from langchain_core.document_loaders.blob_loaders import Blob
 from langchain_community.vectorstores.pgvector import PGVector
+from langchain_core.document_loaders.blob_loaders import Blob
 from langchain_core.runnables import (
     ConfigurableField,
     RunnableConfig,