fix: Resolve environment variable initialization order and load-time API key requirement

agents.py

@@ -4,10 +4,15 @@ from langchain_google_genai import ChatGoogleGenerativeAI
 from langchain_core.prompts import ChatPromptTemplate
 from langchain_core.output_parsers import StrOutputParser
 from tools import web_search, scrape_url
+import os
 from dotenv import load_dotenv  
 
 load_dotenv()  # Load environment variables from .env file
 
+# Map Gemini_API_KEY to GOOGLE_API_KEY for LangChain if necessary
+if "Gemini_API_KEY" in os.environ and "GOOGLE_API_KEY" not in os.environ:
+    os.environ["GOOGLE_API_KEY"] = os.environ["Gemini_API_KEY"]
+
 #Model Setup
 llm= ChatGoogleGenerativeAI(model="gemini-2.5-flash", temperature=0)
 

main.py

@@ -2,7 +2,6 @@ import os
 from fastapi import FastAPI, HTTPException
 from fastapi.middleware.cors import CORSMiddleware
 from pydantic import BaseModel
-from pipeline import run_research_pipeline
 from dotenv import load_dotenv
 
 load_dotenv()
@@ -11,6 +10,8 @@ load_dotenv()
 if "Gemini_API_KEY" in os.environ and "GOOGLE_API_KEY" not in os.environ:
     os.environ["GOOGLE_API_KEY"] = os.environ["Gemini_API_KEY"]
 
+from pipeline import run_research_pipeline
+
 app = FastAPI(
     title="Multi-Agent RAG System API",
     description="REST API for the multi-agent research pipeline.",