MAC Table Support for Cambium Microwave Radio Driver

NetBrain currently does not collect MAC table data from Cambium Microwave Radio devices, since the driver lacks support for the relevant command used to retrieve this information. This enhancement would extend the driver to collect the MAC learning table, consistent with how similar data is gathered from comparable device drivers. Adding this capability would allow NetBrain to accurately discover Layer 2 connections involving Cambium Microwave Radio devices, improving topology completeness for customers operating microwave backhaul links.