Add wp_recache_rejected_cookies option (defaults: woocommerce_items_in_cart, wp_woocommerce_session_*, wp-postpass, comment_author_*, wordpress_*) that bypasses page cache when any listed cookie is present. Both the WP-level check (wp_recache_should_exclude) and the standalone drop-in apply the same exact/prefix matching logic. Editing the option regenerates the drop-in and purges all cache.