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/Controllers/Api/Client/Ticket/TicketController.php

@@ -8,6 +8,7 @@ use App\Http\Resources\Api\Client\Ticket\ClientTicketResource;
 use App\Jobs\Ticket\TicketJobs;
 use App\Mail\TicketCreated;
 use App\Mail\Admin\TicketAdminNotification;
+use App\Models\Service;
 use App\Models\Setting;
 use App\Models\Ticket;
 use App\Models\Notification;
@@ -69,6 +70,15 @@ class TicketController extends Controller
     /**
      * Create a new ticket for the authenticated customer.
      */
+    private function assertServiceTicketable(string $serviceUuid, int $customerId): void
+    {
+        $failed = Service::where('uuid', $serviceUuid)->where('customer_id', $customerId)->where('status', 'failed')->exists();
+        abort_unless($failed, 404, 'Dịch vụ không tồn tại.');
+
+        $hasOpenTicket = Ticket::where('service_uuid', $serviceUuid)->whereIn('status', Ticket::UNRESOLVED_STATUSES)->exists();
+        abort_if($hasOpenTicket, 422, 'Dịch vụ này đã có ticket đang được xử lý.');
+    }
+
     public function store(Request $request)
     {
         $request->validate([
@@ -76,11 +86,17 @@ class TicketController extends Controller
             'description' => ['required', 'string', 'min:20'],
             'room'        => ['nullable', 'string'],
             'data'        => ['nullable', 'array'],
+            'service_uuid' => ['nullable', 'uuid'],
             'images'      => ['nullable', 'array', 'max:5'],
             'images.*'    => ['image', 'mimes:jpg,jpeg,png,gif,webp', 'max:5120'],
         ]);
 
         $customer = auth('client')->user();
+        $serviceUuid = $request->input('service_uuid');
+
+        if ($serviceUuid) {
+            $this->assertServiceTicketable($serviceUuid, $customer->id);
+        }
 
         $ticketNum = 'TKT-' . now()->format('Ymd') . '-' . strtoupper(Str::random(5));
 
@@ -96,6 +112,7 @@ class TicketController extends Controller
             'data'        => $request->input('data') ? json_encode($request->input('data')) : null,
             'gallery'     => $gallery ?: null,
             'customer_id' => $customer->id,
+            'service_uuid' => $serviceUuid,
         ]);
 
         TicketJobs::dispatch($ticket, $customer);