Unify hub/instance TP profit, calc_pnl, and push/accounting to net of 0.05% per side; leave exchange floating PnL unchanged.
Co-authored-by: Cursor <cursoragent@cursor.com>
Load enabled instances from settings, fetch market info via /api/hub/market, and apply exchange-specific amount and price precision in trend and roll calculators.
Co-authored-by: Cursor <cursoragent@cursor.com>