Enhance sales document flow with new service and related functionalities

- Introduced `SalesDocumentFlowService` to manage the lifecycle of sales documents, including packing slips and invoices.
- Implemented methods for processing orders, generating invoices, and handling packing slips based on order status.
- Updated `SalesOrdersService`, `PackingSlipsService`, and `SalesInvoicesService` to integrate with the new document flow service.
- Added new methods for marking drafts processed and checking if invoices are on sales plans.
- Enhanced existing services and repositories to support new functionalities, including status transitions and related document management.
- Updated DTOs to include new fields for packing slip and invoice IDs in sales order responses.
- Added unit tests for the new service and updated existing tests to cover new functionalities.

src/modules/sales/sales-payments/sales-payments.service.spec.ts

@@ -106,7 +106,10 @@ describe('SalesPaymentsService', () => {
   });
 
   it('approving a payment recomputes referenced invoices', async () => {
-    repository.findById.mockResolvedValue(sample);
+    repository.findById.mockResolvedValue({
+      ...sample,
+      status: Status.create('pending', SALES_PAYMENT_STATUSES),
+    });
     salesInvoicesService.getTotals.mockResolvedValue({
       total: Decimal.create('25000'),
       paid: Decimal.create('0'),
@@ -124,7 +127,10 @@ describe('SalesPaymentsService', () => {
   });
 
   it('rejects approve when allocation would exceed the invoice total', async () => {
-    repository.findById.mockResolvedValue(sample);
+    repository.findById.mockResolvedValue({
+      ...sample,
+      status: Status.create('pending', SALES_PAYMENT_STATUSES),
+    });
     salesInvoicesService.getTotals.mockResolvedValue({
       total: Decimal.create('5000'),
       paid: Decimal.create('0'),