Audit log netbox changes to associated management profiles

[lunkwill42]

Is your feature request related to a problem? Please describe.

#2761 fixed a regression crash issue that appears once the deprecated SNMP properties of the Netbox model were removed. While the immediate regression was fixed, it highlighted that changes to management configuration for a Netbox was meant to be audit-logged, and now it's not being audit-logged, which is a shame.

Describe the solution you'd like

When a user adds or removes management profiles to a netbox, these changes should also be audit-logged. E.g. something like username added/removed management profile "x" to/from example-gw.example.org

Additional context

Since profiles are a relation to netbox, the simple attribute comparison routine that was fixed in #2761 won't cut it. The comparison will need to look deeper.