Added a Control Panel Dashboard overview view (vault/dashboard) with
KPI tiles for archived-orders-in-range, all-time archived count, last
archived date, and a list of the 8 most recently archived orders.
The Dashboard nav item is now always shown; the Settings nav item is
still shown only while the plugin's Enabled setting is on.
Initial stable release. Ships the archive database schema
(archive_orders, archive_order_items, archive_order_history,
archive_quotes, archive_quote_items) and the standard yui license
activation flow.
No archiving automation (thresholds, schedule, manual trigger, or console
command) is implemented yet.