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.

src/prisma/prisma.service.ts

@@ -3,6 +3,7 @@ import { PrismaMariaDb } from '@prisma/adapter-mariadb'
 import 'dotenv/config'
 import { env } from 'prisma/config'
 import { PrismaClient } from '../generated/prisma/client'
+import { getPrismaOptions } from './prisma-config.service'
 
 @Injectable()
 export class PrismaService extends PrismaClient implements OnModuleInit, OnModuleDestroy {
@@ -13,9 +14,11 @@ export class PrismaService extends PrismaClient implements OnModuleInit, OnModul
       password: env('DATABASE_PASSWORD'),
       database: env('DATABASE_NAME'),
       port: env('DATABASE_PORT') ? Number(env('DATABASE_PORT')) : 3306,
-      connectionLimit: 5,
+      connectionLimit: 50,
     })
-    super({ adapter })
+
+    const prismaOptions = getPrismaOptions()
+    super({ ...prismaOptions, adapter })
   }
 
   async onModuleInit() {