List thread assignments

curl --request GET \
  --url https://api.wacht.dev/ai/threads/{thread_id}/assignments \
  --cookie __session=

{
  "status": 123,
  "message": "<string>",
  "session": {
    "id": "<string>",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z"
  },
  "errors": [
    {
      "code": "<string>",
      "message": "<string>"
    }
  ],
  "data": {
    "limit": 123,
    "has_more": true,
    "next_cursor": "<string>",
    "data": [
      {
        "id": "<string>",
        "created_at": "2023-11-07T05:31:56Z",
        "updated_at": "2023-11-07T05:31:56Z",
        "board_item_id": "<string>",
        "thread_id": "<string>",
        "assignment_role": "<string>",
        "assignment_order": 123,
        "status": "<string>",
        "instructions": "<string>",
        "handoff_file_path": "<string>",
        "metadata": {},
        "result_status": "<string>",
        "result_summary": "<string>",
        "result_payload": {},
        "claimed_at": "2023-11-07T05:31:56Z",
        "started_at": "2023-11-07T05:31:56Z",
        "completed_at": "2023-11-07T05:31:56Z",
        "rejected_at": "2023-11-07T05:31:56Z"
      }
    ]
  }
}