Previously every hour we would run a full scan of the entire DB searching
for expired uploads that need to be moved to the tombstone folder.
This commit amends it so we only run the job 2 times per clean_orpha_uploads_grace_period_hours
There is a upper bound of 7 days so even if the grace period is set really
high it will still run at least once a week.
By default we have a 48 grace period so this amends it to run this cleanup
daily instead of hourly. This eliminates 23 times we run this ultra expensive
query.
3d85cc1e69