fix(service): chỉ trả mật khẩu hosting cho admin có quyền hosting.view

GET administrator/services/{id} chỉ yêu cầu customer.view nhưng trả kèm mật khẩu
Plesk dạng rõ; giờ chỉ đính kèm khi là Full Administrator hoặc có hosting.view.

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

app/Http/Controllers/Api/Admin/Service/ServiceController.php

@@ -94,7 +94,10 @@ class ServiceController extends Controller
             ->findOrFail($id);
 
         ModuleVmware::resolveVirtualMachineIds([$service->vmware]);
-        \App\Support\HostingCredentials::attach([$service]);
+        $admin = auth()->guard('admin')->user();
+        if ($admin?->hasRole('Full Administrator') || $admin?->hasPermissionTo('hosting.view')) {
+            \App\Support\HostingCredentials::attach([$service]);
+        }
 
         $invoices = $this->linkedInvoices(collect([$service]));
         $payments = InvoicePaymentHistory::forInvoices($invoices);