/* web_monitor sentinel. Intentionally empty.

   This file exists only so that a real browser issues one extra request per
   page view. A request for the HTML alone means a fetch-type client; HTML plus
   this file means a real browser. A plain stylesheet is used rather than a
   JS beacon because content blockers do not filter it.

   Served with Cache-Control: no-store by the front Worker, so it is re-fetched
   on every page view. Do not add any selector here. */