<담보만 담긴 List> Reponse (GET)

[
  {
    "id": 1,
    "plan_tag": "임플란트"
  },
  {
    "id": 2,
    "plan_tag": "브릿지"
  },
  {
    "id": 3,
    "plan_tag": "발치"
  }
]