- Added copayment and adjustment fields (Decimal, default 0) to Payment
model in schema and directly to DB via ALTER TABLE
- Added PATCH /api/payments/:id/copayment and /adjustment routes
- Added inline-editable Copayment and Adjustment columns after MH Paid
with same click-to-edit format; Copayment in blue, Adjustment in orange
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>