Improve load-time caching and baseline snapshots

Fix statcast: fetch regular season data, increase timeout

Fix Model HR% blank: name format mismatch + column renames

Props: multi-book concat-all, full pre-game model stack, pre-season statcast fallback

Post-patch cleanup: statcast season derivation + platoon lower bounds

Update data/statcast.py

Update data/statcast.py

Update data/statcast.py

Rename data/statcast.txt to data/statcast.py