chore(tools/chatbot): use lagchain classic

Author: Clemsazert

tools/chatbot/chatbot.py

@@ -8,8 +8,8 @@
 
 from langchain_community.document_loaders import PyPDFLoader
 
-from langchain.chains import create_retrieval_chain
-from langchain.chains.combine_documents import create_stuff_documents_chain
+from langchain_classic.chains import create_retrieval_chain
+from langchain_classic.chains.combine_documents import create_stuff_documents_chain
 from langchain_core.prompts import ChatPromptTemplate
 
 import os

tools/chatbot/pyproject.toml

@@ -5,7 +5,6 @@ description = "SAMU Hub Santé Slack chatbot"
 requires-python = ">=3.11"
 dependencies = [
     "slack-bolt~=1.26.0",
-    "langchain~=1.0.3",
     "langchain-openai~=1.0.1",
     "langchain-community~=0.4.1",
     "langchain-core~=1.0.2",
@@ -14,11 +13,12 @@ dependencies = [
     "openai~=2.6.1",
     "python-dotenv~=1.2.1",
     "pypdf~=6.1.3",
+    "langchain-classic>=1.0.0",
 ]
 
 [dependency-groups]
 dev = [
     "pytest>=7.0.0",
     "ruff>=0.14.3",
     "pip-audit>=2.6.0",
-]
+]