0.2.0

Add daily flush counters to the activity log (v0.2.0)

The flush feed is a 50-entry ring buffer, so on busy sites it only
covers the last few minutes and gives no sense of purge VOLUME. Tally
events per day per flush type into a second non-autoloaded option
(pruned to 14 days, one extra write on the existing shutdown persist)
and show the totals as a table above the Recent Flushes feed. Counts
are exposed on the /activity REST response; uninstall removes the
new option.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>