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

{
  "status": {
    "code": "20000",
    "message": "OK"
  },
  "result": {
    "chunk_id": "a1b2c3d4e5f6789012345678901234ab",
    "deleted_at": "2024-10-21T12:00:00Z",
    "operation": "delete_chunk"
  }
}