fix: add missing subscribe parameter to Timeouts constructor

All 6 Timeouts parameters are required in livekit_client 2.6.4.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

it0_app/lib/features/agent_call/presentation/pages/agent_call_page.dart

@@ -136,9 +136,10 @@ class _AgentCallPageState extends ConsumerState<AgentCallPage>
           timeouts: Timeouts(
             connection: Duration(seconds: 15),
             debounce: Duration(milliseconds: 20),
+            publish: Duration(seconds: 15),
+            subscribe: Duration(seconds: 15),
             peerConnection: Duration(seconds: 15),
             iceRestart: Duration(seconds: 15),
-            publish: Duration(seconds: 15),
           ),
         ),
         roomOptions: const RoomOptions(