refactor: remove SalesInvoiceItemsService and update sales invoice handling

- Deleted SalesInvoiceItemsService as it was not implemented.
- Changed variable declaration from `const` to `let` in SalesInvoicesService for sales invoice creation.
- Updated response handling after sending to TSP provider in SalesInvoicesService.
- Renamed payload properties in TspProvider DTOs for clarity.
- Enhanced error handling in SalesInvoiceTspSwitchService for unsupported providers.
- Refactored SalesInvoiceTspService to utilize utility functions for payload building and sending.
- Updated PrismaService to increase connection limit and utilize dynamic options.
- Added new migration scripts to update database schema for sale_invoice_tsp_attempts.
- Introduced utility functions for building payloads and handling responses in sales invoice processing.

prisma/migrations/20260507213110_update_sale/migration.sql

@@ -0,0 +1,48 @@
+/*
+  Warnings:
+
+  - You are about to drop the column `request_payload` on the `sale_invoice_tsp_attempts` table. All the data in the column will be lost.
+  - You are about to drop the column `response_payload` on the `sale_invoice_tsp_attempts` table. All the data in the column will be lost.
+  - Added the required column `raw_request_payload` to the `sale_invoice_tsp_attempts` table without a default value. This is not possible if the table is not empty.
+
+*/
+-- DropForeignKey
+ALTER TABLE `sale_invoice_tsp_attempts` DROP FOREIGN KEY `sale_invoice_tsp_attempts_invoice_id_fkey`;
+
+-- DropIndex
+DROP INDEX `sale_invoice_tsp_attempts_invoice_id_key` ON `sale_invoice_tsp_attempts`;
+
+-- AlterTable
+ALTER TABLE `sale_invoice_tsp_attempts`
+    ADD COLUMN `provider_request_payload` JSON NULL,
+    ADD COLUMN `provider_response_payload` JSON NULL,
+    ADD COLUMN `raw_request_payload` JSON NOT NULL;
+
+UPDATE `sale_invoice_tsp_attempts`
+  SET `provider_response_payload` = `response_payload`;
+UPDATE `sale_invoice_tsp_attempts`
+  SET `raw_request_payload` = `request_payload`;
+
+ALTER TABLE `sale_invoice_tsp_attempts`
+    DROP COLUMN `response_payload`,
+    DROP COLUMN `request_payload`;
+
+-- AddForeignKey
+-- Check if the foreign key constraint already exists before adding it
+SET @constraint_exists = (
+  SELECT COUNT(*)
+  FROM information_schema.TABLE_CONSTRAINTS
+  WHERE CONSTRAINT_SCHEMA = DATABASE()
+    AND TABLE_NAME = 'customer_legal'
+    AND CONSTRAINT_NAME = 'customer_legal_business_activity_id_fkey'
+    AND CONSTRAINT_TYPE = 'FOREIGN KEY'
+);
+
+SET @sql = IF(@constraint_exists = 0,
+  'ALTER TABLE `customer_legal` ADD CONSTRAINT `customer_legal_business_activity_id_fkey` FOREIGN KEY (`business_activity_id`) REFERENCES `business_activities`(`id`) ON DELETE RESTRICT ON UPDATE CASCADE;',
+  'SELECT "Foreign key constraint customer_legal_business_activity_id_fkey already exists" as message;'
+);
+
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;

prisma/schema/shared/sales.prisma

@@ -72,15 +72,16 @@ model SaleInvoiceTspAttempts {
   attempt_no Int
   status     TspProviderResponseStatus
 
-  request_payload  Json?
-  response_payload Json?
-  message          String @db.Text
+  raw_request_payload       Json
+  provider_request_payload  Json?
+  provider_response_payload Json?
+  message                   String @db.Text
 
   sent_at     DateTime? @db.Timestamp(0)
   received_at DateTime? @db.Timestamp(0)
   created_at  DateTime  @default(now()) @db.Timestamp(0)
 
-  invoice_id String       @unique
+  invoice_id String
   invoice    SalesInvoice @relation(fields: [invoice_id], references: [id], onDelete: Cascade)
 
   @@unique([invoice_id, attempt_no])