List handoffs

curl --request GET \
  --url https://api-sandbox.featherhq.com/v1/hitl/handoffs \
  --header 'x-api-key: <api-key>'

{
  "items": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "organization_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "conversation_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "conv_turn_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "reason": "<string>",
      "static_text": "<string>",
      "assignee": "<string>",
      "packet": {
        "static_text": "<string>",
        "reason": "<string>",
        "context_vars": {},
        "summary": "<string>",
        "transcript_ptr": {
          "conversation_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
          "up_to_seq": 123
        },
        "transfer_to": "<string>",
        "transfer_label": "<string>"
      },
      "created_at": "2023-11-07T05:31:56Z",
      "resolved_at": "2023-11-07T05:31:56Z"
    }
  ],
  "next_cursor": "<string>"
}