Merge master into main: resolve conflicts and remove data files for LFS compatibility

Remove generated PNG files to resolve LFS issues - files can be regenerated

Initial commit after git-lfs re-init and bugfixes

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

Restore CSV and PNG files with Git LFS tracking

Remove CSV files from tracking

Security: Move API key to environment variables and update documentation

Remove CSV files from tracking

Initial commit: FRED_ML project without binary files