- Modified `refresh_data.py` to include "CBBTCUSD" and "GLOBAL_M2" in the DEFAULT_SERIES for enhanced data analysis.
- Updated `fred.db` to reflect changes in the data structure.
- Introduced `scripts/refresh_data.py` to download UNRATE and WTI data from FRED and store it in a SQLite database.
- Added `startup.sh` script to set up a Python virtual environment and install dependencies for offline use.
- Updated `repo-context.txt` to reflect the new scripts and their purposes.