feat(phase-16.3): light up anonId unique-listener layer

Mint a first-party localStorage anonId, thread it onto play/share beacons,
persist it via EventController, and add all-time distinct-listener counts
(site/track/release). Storage columns + indexes already existed from 16.1.

DeepDrftPublic/Components/App.razor

@@ -26,6 +26,7 @@
 <script type="module">
         import('./js/audio/index.js');
         import('./js/telemetry/beacon.js');
+        import('./js/telemetry/anonid.js');
     </script>
 </body>
 </html>