Ensure attempts to send the daily email are unique to that day.
Ensure attempts to send the daily email are unique to that day.

We had a problem in which past failures were preventing queuing new jobs for
each user until we cleared out the backlog of failed delayed jobs.

inaturalist/inaturalist,pleary/inaturalist,inaturalist/inaturalist,pleary/inaturalist,inaturalist/inaturalist,pleary/inaturalist,pleary/inaturalist,inaturalist/inaturalist,inaturalist/inaturalist,pleary/inaturalist