Rotate an agent's API key

curl --request POST \
  --url https://backend.inkwell.finance/api/v1/agents/{id}/rotate \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "data": {
    "id": 123,
    "key": "<string>",
    "keyPrefix": "<string>",
    "warning": "<string>"
  }
}