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/Http/Resources/Api/Admin/OrderResource.php

@@ -70,6 +70,7 @@ class OrderResource extends JsonResource
                 'attachments' => $invoice->relationLoaded('attachments')
                     ? $invoice->attachments->map(fn($attachment) => [
                         'id'        => $attachment->id,
+                        'type'      => $attachment->type,
                         'filename'  => $attachment->filename,
                         'url'       => $attachment->url,
                         'mime_type' => $attachment->mime_type,