* feature: add public order properties
- add OutsideRegularTradingHours for extended-hours equity orders
- add UseMargin to select margin or cash-only buying power
* feat: restriction Limit Outside trading validation
* fix: resolve public order use margin from account type
- make UseMargin nullable so an unset margin account uses margin buying power
- resolve UseMargin from account type in CanSubmitOrder; cash forces it off
Roman Yavnikov
22655e8afe