If the same campaign is sent multiple times over an extended period of
time, we need to ensure we consider the processed_at for all associated
sending queues.
MAILPOET-5629
Determining if an automation was sent to/filtered by a segment is much
more complicated than the rest of this data and might require some
changes on the automations side for efficiency, so I think it would be
best to hold off on these for now and we can figure it all out together
when we update the reporting to include other automation data like
trigger filters.
MAILPOET-5629
