generate device keys is missing elements available on other SDKs

[skeet70]

https://ironcorelabs.com/docs/data-control-platform/nodejs/user-operations/#ironnodeusergeneratedevicekeys

IronOxide (reference impl) and ironweb both return a more complete object for device creation, and the device ID is needed to later intelligently revoke said device. Bring ironnode into alignment here, should be able to do it additively.