add permissions to execution response model

src/Appwrite/Utopia/Response/Model/Execution.php

@@ -16,6 +16,13 @@ class Execution extends Model
                 'default' => '',
                 'example' => '5e5ea5c16897e',
             ])
+            ->addRule('$permissions', [
+                'type' => Response::MODEL_PERMISSIONS,
+                'description' => 'Execution permissions.',
+                'default' => new \stdClass,
+                'example' => new \stdClass,
+                'array' => false,
+            ])
             ->addRule('functionId', [
                 'type' => self::TYPE_STRING,
                 'description' => 'Function ID.',