Implement /range API endpoints for general node data.
Use UTC time zone for consistency with DatumController.
Tweak QueryBiz API method parameter order so that AOP security filter more easily works with old and new general datum API.
Tweak to INSERT first, then UPDATE on unique violation. We expect a
majority of INSERTs.
Add migration support for solarnet.sn_hardware_control_datum.
Don't bother with CLUSTER; does that even help on ZFS?
Add support for /mostRecent endpoint returning general node datum.