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/common/services/saleInvoices/sale-invoice-create.service.ts

@@ -1,3 +1,4 @@
+import { QUERY_CONSTANTS } from '@/common/queryConstants'
 import { SalesInvoiceCreateInput } from '@/generated/prisma/models'
 import { PrismaService } from '@/prisma/prisma.service'
 import { BadRequestException, Injectable } from '@nestjs/common'
@@ -84,6 +85,7 @@ export class SharedSaleInvoiceCreateService {
 
           const salesInvoice = await $tx.salesInvoice.create({
             data: salesInvoiceData,
+            select: { ...QUERY_CONSTANTS.SALE_INVOICE.select },
           })
 
           await this.createPayments(