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/objects/PaymentSumAggregateInput.schema.ts

@@ -11,7 +11,10 @@ const makeSchema = () => z.object({
   totalBilled: z.literal(true).optional(),
   totalPaid: z.literal(true).optional(),
   totalAdjusted: z.literal(true).optional(),
-  totalDue: z.literal(true).optional()
+  totalDue: z.literal(true).optional(),
+  mhPaidAmount: z.literal(true).optional(),
+  copayment: z.literal(true).optional(),
+  adjustment: z.literal(true).optional()
 }).strict();
 export const PaymentSumAggregateInputObjectSchema: z.ZodType<Prisma.PaymentSumAggregateInputType> = makeSchema() as unknown as z.ZodType<Prisma.PaymentSumAggregateInputType>;
 export const PaymentSumAggregateInputObjectZodSchema = makeSchema();