Store UBNT AirFiber capacity data in the database

There are two pieces of data returned in an SNMP poll on UBNT AirFiber radios - txCapacity.1 and rxCapacity.1 - this data is already used to generate a graph for link capacity.

Could we have this data also stored in the database so alerts could be written to monitor link capacity and notify us when a connection drops below a desired threshold?

This may possibly address this: https://github.com/librenms/librenms/pull/6471

Awesome. Thanks!