curl --location --request POST '/category/insertAfter?parentId=1706976554962857985&categoryName=UDP协议'
{ "code": 200, "msg": "success", "data": { "categoryId": "1706977163560517634", "categoryName": "UDP协议", "parentId": "1706976554962857985", "leftIndex": 42, "rightIndex": 43 } }