[
  {
    "annotation_id": "ann_5021",
    "book_id": "book_1207",
    "page": 142,
    "kind": "메모",
    "range_start": 1180,
    "range_end": 1264,
    "color": "노랑",
    "note_text": "경사 하강법: 학습률 0.1 이 더 빠름",
    "version": 4,
    "updated_by_device": "dev-t2c91",
    "updated_at": "2026-10-10T22:15:00+09:00",
    "last_edit_key": "dev-t2c91:0217",
    "deleted_at": null
  },
  {
    "annotation_id": "ann_4877",
    "book_id": "book_1207",
    "page": 88,
    "kind": "메모",
    "range_start": 402,
    "range_end": 455,
    "color": "노랑",
    "note_text": "과대적합 예시: 훈련 정확도만 높음",
    "version": 3,
    "updated_by_device": "dev-t2c91",
    "updated_at": "2026-10-10T21:14:00+09:00",
    "last_edit_key": "dev-t2c91:0214",
    "deleted_at": "2026-10-10T21:14:00+09:00"
  },
  {
    "annotation_id": "ann_5110",
    "book_id": "book_1207",
    "page": 201,
    "kind": "형광펜",
    "range_start": 2210,
    "range_end": 2388,
    "color": "초록",
    "note_text": null,
    "version": 1,
    "updated_by_device": "dev-t2c91",
    "updated_at": "2026-10-11T19:40:00+09:00",
    "last_edit_key": "dev-t2c91:0221",
    "deleted_at": null
  },
  {
    "annotation_id": "ann_5133",
    "book_id": "book_1207",
    "page": 57,
    "kind": "북마크",
    "range_start": null,
    "range_end": null,
    "color": null,
    "note_text": null,
    "version": 1,
    "updated_by_device": "dev-t2c91",
    "updated_at": "2026-10-11T20:05:00+09:00",
    "last_edit_key": "dev-t2c91:0223",
    "deleted_at": null
  },
  {
    "annotation_id": "ann_4950",
    "book_id": "book_1207",
    "page": 63,
    "kind": "형광펜",
    "range_start": 510,
    "range_end": 590,
    "color": "노랑",
    "note_text": null,
    "version": 2,
    "updated_by_device": "dev-p7f3a",
    "updated_at": "2026-10-08T23:10:00+09:00",
    "last_edit_key": "dev-p7f3a:0391",
    "deleted_at": null
  },
  {
    "annotation_id": "ann_5140",
    "book_id": "book_1207",
    "page": 210,
    "kind": "형광펜",
    "range_start": 100,
    "range_end": 180,
    "color": "초록",
    "note_text": null,
    "version": 1,
    "updated_by_device": "dev-t2c91",
    "updated_at": "2026-10-11T21:30:00+09:00",
    "last_edit_key": "dev-t2c91:0225",
    "deleted_at": null
  },
  {
    "annotation_id": "ann_4801",
    "book_id": "book_1207",
    "page": 75,
    "kind": "메모",
    "range_start": 300,
    "range_end": 340,
    "color": "분홍",
    "note_text": "배치 크기 32 부터",
    "version": 5,
    "updated_by_device": "dev-p7f3a",
    "updated_at": "2026-10-09T07:48:40+09:00",
    "last_edit_key": "dev-p7f3a:0398",
    "deleted_at": null
  },
  {
    "annotation_id": "ann_4712",
    "book_id": "book_0931",
    "page": 12,
    "kind": "형광펜",
    "range_start": 40,
    "range_end": 120,
    "color": "노랑",
    "note_text": null,
    "version": 2,
    "updated_by_device": "dev-t2c91",
    "updated_at": "2026-10-07T21:00:00+09:00",
    "last_edit_key": "dev-t2c91:0190",
    "deleted_at": null
  },
  {
    "annotation_id": "ann_4730",
    "book_id": "book_0931",
    "page": 30,
    "kind": "메모",
    "range_start": 15,
    "range_end": 60,
    "color": "노랑",
    "note_text": "REST 와 RPC 차이",
    "version": 1,
    "updated_by_device": "dev-p7f3a",
    "updated_at": "2026-10-06T08:30:00+09:00",
    "last_edit_key": "dev-p7f3a:0371",
    "deleted_at": null
  },
  {
    "annotation_id": "ann_5150",
    "book_id": "book_1207",
    "page": 142,
    "kind": "형광펜",
    "range_start": 1300,
    "range_end": 1350,
    "color": "초록",
    "note_text": null,
    "version": 1,
    "updated_by_device": "dev-t2c91",
    "updated_at": "2026-10-10T22:20:00+09:00",
    "last_edit_key": "dev-t2c91:0218",
    "deleted_at": null
  },
  {
    "annotation_id": "ann_4655",
    "book_id": "book_1207",
    "page": 99,
    "kind": "메모",
    "range_start": 620,
    "range_end": 690,
    "color": "노랑",
    "note_text": "드롭아웃 비율 0.5",
    "version": 4,
    "updated_by_device": "dev-p7f3a",
    "updated_at": "2026-10-05T22:40:00+09:00",
    "last_edit_key": "dev-p7f3a:0360",
    "deleted_at": "2026-10-05T22:40:00+09:00"
  },
  {
    "annotation_id": "ann_4733",
    "book_id": "book_0931",
    "page": 31,
    "kind": "메모",
    "range_start": 80,
    "range_end": 140,
    "color": "노랑",
    "note_text": "멱등성: 같은 요청 여러 번",
    "version": 2,
    "updated_by_device": "dev-p7f3a",
    "updated_at": "2026-10-08T07:30:00+09:00",
    "last_edit_key": "dev-p7f3a:0389",
    "deleted_at": null
  }
]