Something like this is needed, because data kept in Foreman can have wide impact.
It would be better to get an email alert, before looking in the Audit logs.

For example, when a class is added/removed to a host-group, the group owners or site admin should get an email.

Or if a parameter is changed for a host, an email should be sent out.

Not sure if it is better to do this via observers, or in background jobs.

I tried to make a Audit observer + mailer, but it sends emails in the foreground, immediately.
And it sends 1 email for each entry in the Audit model, even if the multiple entries are for the same object (say Host).