fix: resolve duckduckgo-search import error for CI

Author: Edge-Explorer

backend/services/intelligence_service.py

@@ -10,7 +10,7 @@
 
 # LangChain / LangGraph imports
 from langgraph.graph import StateGraph, END
-from ddgs import DDGS
+from duckduckgo_search import DDGS
 from langchain_google_genai import ChatGoogleGenerativeAI
 from langchain_core.messages import BaseMessage, HumanMessage, SystemMessage
 from rapidfuzz import process, fuzz