EVT_GW_WANTransition missing event

[jasperslits]

Not sure if this is still applicable since your changes in #205

EVT_GW_WANTransition is one I've seen as warning when there was a WAN problem.

Full messages:

Unsupported event key EVT_GW_WANTransition
Unsupported event {'gw': '74:ac:b9:58:b9:ce', 'iface': 'eth8', 'state': 'active', 'key': 'EVT_GW_WANTransition', 'dm': '74:ac:b9:58:b9:ce', 'dm_name': 'UDM XXXX', 'dm_model': 'UDMPRO', 'dm_displayName': 'UDM XXXX', 'gw_displayName': 'UDM XXXX', 'subsystem': 'lan', 'is_negative': False, 'site_id': '60dee48f6573ae03e1f837d7', 'time': 1665651169000, 'datetime': '2022-10-13T08:52:49Z', 'msg': 'Gateway[74:ac:b9:58:b9:cf] WAN iface eth8 transition to state active', '_id': '6347d1e1b17ae55c1341d2df'}

[Kane610]

If it's in the logs it's applicable. I just extended to get the full event to provide me the opportunity to support them properly :)