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/Service/Concerns/ManagesVmPower.php

@@ -33,6 +33,7 @@ trait ManagesVmPower
             return $this->vmLocked();
         }
 
+        $startedAt = now();
         try {
             $result = $action->execute($vm);
         } finally {
@@ -44,6 +45,8 @@ trait ManagesVmPower
             logName: 'VM',
             description: "Customer {$request->user()->email} bật VM: {$vm->name} (ID: {$vm->vmware_id})",
             subject: $vm,
+            startedAt: $startedAt,
+            finishedAt: now(),
         );
 
         return $this->vmResponse($result, 'Đã gửi lệnh bật VM.');
@@ -71,6 +74,7 @@ trait ManagesVmPower
             return $this->vmLocked();
         }
 
+        $startedAt = now();
         try {
             $result = $action->execute($vm);
         } finally {
@@ -82,6 +86,8 @@ trait ManagesVmPower
             logName: 'VM',
             description: "Customer {$request->user()->email} tắt VM: {$vm->name} (ID: {$vm->vmware_id})",
             subject: $vm,
+            startedAt: $startedAt,
+            finishedAt: now(),
         );
 
         return $this->vmResponse($result, 'Đã gửi lệnh tắt VM.');
@@ -104,6 +110,7 @@ trait ManagesVmPower
             return $this->vmLocked();
         }
 
+        $startedAt = now();
         try {
             $result = $serviceVCenter->restartVM($vm, $vm->vmware_id);
         } finally {
@@ -122,6 +129,8 @@ trait ManagesVmPower
             logName: 'VM',
             description: "Customer {$request->user()->email} restart VM: {$vm->name} (ID: {$vm->vmware_id})",
             subject: $vm,
+            startedAt: $startedAt,
+            finishedAt: now(),
         );
 
         return response()->json([