feat: add Copayment and Adjustment columns to payments table

- 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>

packages/db/shared/schemas/variants/input/index.ts

@@ -31,3 +31,4 @@ export { TwilioSettingsInputSchema } from './TwilioSettings.input';
 export { AiSettingsInputSchema } from './AiSettings.input';
 export { OfficeHoursInputSchema } from './OfficeHours.input';
 export { OfficeContactInputSchema } from './OfficeContact.input';
+export { ProcedureTimeslotInputSchema } from './ProcedureTimeslot.input';