curl --request DELETE \
  --url https://api.clovastudio.go.kr/v1/rag42/collections/{collection_id} \
  --header 'Authorization: Bearer <token>'

{
  "status": {
    "code": "20000",
    "message": "OK"
  },
  "result": {
    "collection_id": "ef7483af16d84818a59dcbcf8b587b93",
    "message": "Collection deleted successfully",
    "operation": "delete_collection"
  }
}