Improved Bot Exit Logic and Trade Accounting

We have updated the bot runtime to improve trade quality and accounting accuracy. Strategy-based exits now avoid closing scalping trades too early during short-term market noise, while stop-loss handling now prevents user-configured stops from being looser than the system risk controls. Take-profit logic now includes a stronger fee and slippage buffer so profitable exits are more likely to remain profitable after costs. We also improved net PnL calculations by accounting for buy and sell fees, base-asset fees, BNB fees, and partial fill/dust scenarios. These changes are designed to reduce unnecessary losing exits and make reported trade results more accurate.