The data/ volume was mounted :ro to protect Google Sheets credentials,
but this also prevented all state trackers from persisting JSON files
(scorecards, voice channels, trade channels, soak data), causing silent
save failures and stale data accumulating across restarts.
- Mount only the credentials file as :ro (file-level mount)
- Add a separate :rw storage/ volume for runtime state files
- Move all tracker default paths from data/ to storage/
- Add STATE_HOST_PATH env var (defaults to ./storage)
- Update SHEETS_CREDENTIALS_HOST_PATH semantics: now a file path
(e.g. ./data/major-domo-service-creds.json) instead of a directory
- Add storage/ to .gitignore
Closes#85
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
