Add comprehensive debug logging to track FRED API key loading and propagation

Fix st.secrets assignment error - remove read-only assignment and only set os.environ

Fix FRED API key propagation - ensure key is available in both os.environ and st.secrets for the real app

Add diagnostic version of streamlit_app.py to isolate FRED API key issues in Streamlit Cloud

Remove FRED API key debug message from UI and fix Streamlit Cloud deployment

Rewrite streamlit_app.py as a clean, robust Streamlit Cloud entry point

Add FRED API key validation at app startup and improve environment variable loading

Fix streamlit_app.py to properly use imported main() function instead of always overriding with fallback

Fix Streamlit Cloud deployment import issue - Added robust import handling with fallbacks - Added current directory to Python path - Added error handling for import failures - Improved debugging output for deployment troubleshooting

Optimize Streamlit app performance with lazy imports and loading indicators

Fix Streamlit Cloud deployment issues and deprecated pandas warnings

Prepare for Streamlit Cloud deployment - Add deployment files, fix clustering chart error, update requirements