fix(telemetry): first-party fetch for play/share, beacon only on unload

Route normal play closes (end/switch/stop) and all shares through a same-origin
HttpClient POST so privacy-hardened browsers stop blocking them; keep sendBeacon
for the tab-unload edge. Rename the JS module off telemetry/beacon to session/
lifecycle so the retained fallback isn't name-matched. No new data or identifiers.

DeepDrftPublic/Components/App.razor

@@ -27,8 +27,8 @@
 <script type="module">
         import('./js/settings/settings.js');
         import('./js/audio/index.js');
-        import('./js/telemetry/beacon.js');
-        import('./js/telemetry/anonid.js');
+        import('./js/session/lifecycle.js');
+        import('./js/session/anonid.js');
     </script>
 </body>
 </html>