properly loading .env file with dotenv

services/rag/langchain/agent.py

@@ -2,6 +2,7 @@
 
 import os
 from typing import List, Dict, Any, Optional, Tuple
+from dotenv import load_dotenv
 from langchain_core.tools import BaseTool, tool
 from langchain_core.runnables import RunnableConfig
 from langchain_core.messages import HumanMessage, AIMessage, BaseMessage
@@ -15,6 +16,9 @@ from loguru import logger
 from retrieval import create_retriever
 from vector_storage import initialize_vector_store
 
+# Load environment variables
+load_dotenv()
+
 
 def get_llm_model_info(llm_model: str = None) -> Tuple[str, str, str, str, str]:
     """