feat: khởi tạo/huỷ domain Plesk qua job, gửi mail hoá đơn qua queue, đính kèm triển khai

- ProvisionDnsDomainJob/SuspendDnsDomainJob: tạo domain admin lên Plesk, huỷ = suspend (is_created=3)
- Khách xem zone DNS được gán ở /dich-vu/domain, quản lý bản ghi A/AAAA/CNAME/TXT/MX/SRV
- send-mail hoá đơn đẩy SendInvoiceMailJob, preview + sửa nội dung, ghi mail.order_id
- invoice_attachments.type (payment_proof/deployment)
- CacheService xoá theo SCAN pattern, Redis không persistent mặc định
- Backfill transactions.public_code

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/Services/Api/Domain/DomainOrderService.php

@@ -122,7 +122,7 @@ class DomainOrderService
 
             Transaction::create([
                 'uuid'        => (string) Str::uuid(),
-                'public_code' => 'DOM-' . now()->format('Ymd') . '-' . strtoupper(Str::random(6)),
+                'public_code' => Transaction::newPublicCode('DOM'),
                 'trans'       => $invoice->invoice_number,
                 'amount'      => $price,
                 'customer_id' => $lockedCustomer->id,
@@ -341,7 +341,7 @@ class DomainOrderService
 
             Transaction::create([
                 'uuid'        => (string) Str::uuid(),
-                'public_code' => 'DOM-REF-' . now()->format('Ymd') . '-' . strtoupper(Str::random(6)),
+                'public_code' => Transaction::newPublicCode('DOM-REF'),
                 'trans'       => 'REF-' . $invoice->invoice_number,
                 'amount'      => $refundAmount,
                 'customer_id' => $lockedCustomer->id,