CRITICAL BUG: Position Manager was using current price to determine exit reason,
but on-chain orders filled at a DIFFERENT price in the past!
Example: LONG entry $184.55, TP1 filled at $184.66, but when Position Manager
checked later (price dropped), it saw currentPrice < TP1 and defaulted to 'SL'
Result: Profitable trades incorrectly labeled as SL exits in database
Fix:
- Use trade.tp1Hit and trade.tp2Hit flags to determine exit reason
- If no TP flags set, use realized P&L to distinguish:
- Profit >0.5% = TP1 filled
- Negative P&L = SL filled
- Remove duplicate P&L calculation
This ensures exit reasons match actual on-chain order fills
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