- hivepress-marketplace stores its filterable, sortable listing price as
hp_price; hp_purchase_price never existed (dev34: 588 hp_price rows)
- Drop hp_purchase_count: the addon keeps no per-listing sales counter
- Remove the stale docblock note about the legacy core registration path
Verify: vendor/bin/phpunit --filter test_on_register_fields_registers_hot_hp_price;
addon unit 156 OK, integration 57 OK
PR: PR-011