Question: Why doesn't the purge process delete very old samples?
Answer: The purge process uses the timestamp of the most recent successful sample for each target database
to determine when to stop deleting data for that target, not the current date and time.
For example, if the Foxhound Options - Purge section specifies "Purge all sample data: after 1 week",
and the most recent successful sample is 100 weeks old, then the purge will stop deleting data when it reaches the successful sample that is 101 weeks old.