curl -X PATCH "https://api.chatgrid.ai/v1/boards/a1b2c3d4-e5f6-7890-abcd-ef1234567890/nodes/e5f6a7b8-c9d0-1234-efab-345678901234" \
  -H "Authorization: Bearer cgk_live_a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6" \
  -H "Content-Type: application/json" \
  -d '{"position": {"x": 300, "y": 150}, "data": {"label": "Updated Research Note", "text": "Follow up after the planning meeting."}}'

{
  "object": "node",
  "data": {
    "id": "e5f6a7b8-c9d0-1234-efab-345678901234",
    "node_type": "note",
    "position_x": 300,
    "position_y": 150,
    "node_data": { "label": "Updated Research Note", "text": "Follow up after the planning meeting." },
    "parent_node_id": null,
    "created_at": "2026-03-15T10:31:00.000Z",
    "updated_at": "2026-03-15T14:00:00.000Z"
  }
}