feat: Deploy Streamlit interface instead of FastAPI API on Hugging Face

trigger sync after adding HF_TOKEN

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

fix: Add missing rich dependency to requirement.txt

docs: Add README.md with Hugging Face Space configuration

fix: Update Hugging Face username to DhruvSoni in sync workflow

feat: Add FastAPI deployment files, Dockerfile, and Hugging Face sync GitHub Action

Fix rate limits by adding time.sleep delays between pipeline steps

Initial commit: Multi-Agent research pipeline using LangGraph and Gemini