- Remove trade from Position Manager BEFORE closing Drift position (prevents race condition)
- Explicitly save closure to database with proper P&L calculation
- Mark flipped positions as 'manual' exit reason
- Increase delay from 1s to 2s for better on-chain confirmation
- Preserve MAE/MFE data in closure records
Fixes issue where SHORT signal would close LONG but not properly track the new SHORT position.
Database now correctly records both old position closure and new position opening.
f682b93a1e