- Implemented `catalog.py` to define instrument metadata and price scaling checks.
- Developed `sqx.py` for decoding SQX tick .dat files, handling scaling and volume adjustments.
- Created `sqxbars.py` to decode SQX bar files, ensuring price integrity against known ranges.
- Introduced `volume_gate.py` for relative volume analysis on D1 bars, facilitating backtesting strategies.
