Add lookup tables, payment methods, tax exemptions, and processor link APIs

Replace unit_status and item_condition pgEnums with company-scoped lookup
tables that support custom values. Add account_payment_method table,
tax_exemption table with approve/revoke workflow, and CRUD routes for
processor links. Validate inventory unit status/condition against lookup
tables at service layer.

packages/shared/src/schemas/index.ts

@@ -6,17 +6,35 @@ export type { RegisterInput, LoginInput } from './auth.schema.js'
 
 export {
   BillingMode,
+  PaymentProcessor,
+  TaxExemptStatus,
   AccountCreateSchema,
   AccountUpdateSchema,
   MemberCreateSchema,
   MemberUpdateSchema,
   AccountSearchSchema,
+  ProcessorLinkCreateSchema,
+  ProcessorLinkUpdateSchema,
+  PaymentMethodCreateSchema,
+  PaymentMethodUpdateSchema,
+  TaxExemptionCreateSchema,
+  TaxExemptionUpdateSchema,
+  LookupCreateSchema,
+  LookupUpdateSchema,
 } from './account.schema.js'
 export type {
   AccountCreateInput,
   AccountUpdateInput,
   MemberCreateInput,
   MemberUpdateInput,
+  ProcessorLinkCreateInput,
+  ProcessorLinkUpdateInput,
+  PaymentMethodCreateInput,
+  PaymentMethodUpdateInput,
+  TaxExemptionCreateInput,
+  TaxExemptionUpdateInput,
+  LookupCreateInput,
+  LookupUpdateInput,
 } from './account.schema.js'
 
 export {
@@ -26,6 +44,8 @@ export {
   SupplierUpdateSchema,
   ItemCondition,
   UnitStatus,
+  SystemItemCondition,
+  SystemUnitStatus,
   ProductCreateSchema,
   ProductUpdateSchema,
   ProductSearchSchema,