fix(lobby_transfer): pass connectionOptions object to transferPlayer

The @minecraft/server-admin beta transferPlayer API takes
(player, { hostname, port }) — passing host/port positionally raised
"incorrect arguments, expected 2 received 3" at runtime. Matches the
working call site in hub_return_transfer_BP.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

lobby-addon/lobby_transfer_BP/scripts/main.js

@@ -97,7 +97,7 @@ system.runInterval(() => {
     // transferPlayer from @minecraft/server-admin beta API — requires gametest experiment + permissions.json allows server-admin.
     system.runTimeout(() => {
       try {
-        transferPlayer(player, portal.host, portal.port);
+        transferPlayer(player, { hostname: portal.host, port: portal.port });
       } catch (e) {
         player.sendMessage(`§cTransfer failed: ${e.message}`);
       }