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/InvoicePaymentService.php

@@ -243,7 +243,7 @@ class InvoicePaymentService
 
             Transaction::create([
                 'uuid' => (string) Str::uuid(),
-                'public_code' => 'INV-REF-' . now()->format('Ymd') . '-' . strtoupper(Str::random(6)),
+                'public_code' => Transaction::newPublicCode('INV-REF'),
                 'trans' => $invoice->invoice_number . '-REFUND',
                 'type' => 'refund',
                 'amount' => -$refundAmount,
@@ -295,7 +295,7 @@ class InvoicePaymentService
             ],
             [
                 'uuid' => (string) Str::uuid(),
-                'public_code' => 'INV-PAY-' . now()->format('Ymd') . '-' . strtoupper(Str::random(6)),
+                'public_code' => Transaction::newPublicCode('INV-PAY'),
                 'amount' => $amount,
                 'received_amount' => $amount,
                 'user_id' => $adminId,