feat: add settlement_type to SalesInvoice model and related DTOs

- Added settlement_type field to SalesInvoice model with ENUM values (CASH, CREDIT, MIXED).
- Updated SalesInvoice aggregate types, input types, and where filters to include settlement_type.
- Modified StatisticsService to calculate credit amounts based on settlement_type.
- Enhanced TspProviderOriginalSendPayloadDto to include settlement_type.
- Updated NamaProvider DTOs and utility functions to handle new settlement_type logic.
- Created migration to add settlement_type column to sales_invoices table and backfill existing records.

src/modules/tspProviders/sales-invoice-tsp.service.ts

@@ -288,6 +288,7 @@ export class SalesInvoiceTspService {
             items: dataToUpdate.items,
             total_amount: dataToUpdate.total_amount,
             customer_id: relatedInvoice.customer_id || undefined,
+            settlement_type: relatedInvoice.settlement_type,
           },
           businessId,
           complexId,
@@ -320,8 +321,7 @@ export class SalesInvoiceTspService {
     )
     if (result?.hasError) {
       result.provider_request_payload =
-        result.provider_request_payload ||
-        JSON.parse(JSON.stringify(correctionPayload))
+        result.provider_request_payload || JSON.parse(JSON.stringify(correctionPayload))
       result.sent_at = result.sent_at || new Date().toISOString()
       result.received_at = result.received_at || new Date().toISOString()
     }
@@ -472,6 +472,7 @@ export class SalesInvoiceTspService {
             customer_type: relatedInvoice.customer?.type || CustomerType.UNKNOWN,
             invoice_date: new Date(),
             payments,
+            settlement_type: relatedInvoice.settlement_type,
             items: relatedInvoice.items.map(item => ({
               unit_price: Number(item.unit_price),
               quantity: Number(item.quantity),