Enhance vehicle summary retrieval for customers and update OpenAPI schema for subuser management grants

services/nginx/app/routes/vehiclesRoute.php

@@ -82,10 +82,15 @@ class vehiclesRoute
 
     private function buildVehicleSummaryForCustomer(int $customerNumber): array
     {
-        $rows = (new customer_vehicles_o())->getFieldsWhere([
+        $vehicles = new customer_vehicles_o();
+        $filters = [
             'customer_id' => $customerNumber,
-            'deleted_at' => null,
-        ], [
+        ];
+        if ($vehicles->columnsExist(['deleted_at'])) {
+            $filters['deleted_at'] = null;
+        }
+
+        $rows = $vehicles->getFieldsWhere($filters, [
             'id',
             'wash_subscription',
         ]);