feat(vm): hoàn tiền khi cấp VM lỗi, theo dõi job queue, uuid dịch vụ cho ticket, chuẩn hoá RAM addon

- VmProvisionException/VmProvisionRefund xử lý lỗi cấp phát VM
- QueueJobInspector + QueueMonitorController xem chi tiết job
- Thêm service uuid cho ticket, thời lượng cho activity_logs
- Migration chuẩn hoá RAM addon sang MB, trạng thái deleting cho snapshot

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

app/Http/Resources/Api/Service/VpsServiceResource.php

@@ -3,6 +3,7 @@
 namespace App\Http\Resources\Api\Service;
 
 use App\Models\Product;
+use App\Models\Ticket;
 use App\Support\ServiceGroup;
 use Illuminate\Http\Request;
 use Illuminate\Http\Resources\Json\JsonResource;
@@ -45,6 +46,9 @@ class VpsServiceResource extends JsonResource
             'order_num' => $order?->order_num,
             'status' => $this->status,
             'status_label' => $this->status_label,
+            'failure_ticket' => $this->status === 'failed'
+                ? Ticket::where('service_uuid', $this->uuid)->latest('id')->first(['ticket_num', 'status'])
+                : null,
             'auto_renew' => (bool) $this->auto_renew,
             'cancel_at_expiry' => (bool) $this->cancel_at_expiry,
             'started_at' => $this->started_at?->toISOString(),