feat: add service name to app-server (#12319)

Add service name to the app-server so that the app can use it's own
service name

This is on thread level because later we might plan the app-server to
become a singleton on the computer

codex-rs/core/src/codex_delegate.rs

@@ -59,6 +59,7 @@ pub(crate) async fn run_codex_thread_interactive(
         parent_session.services.agent_control.clone(),
         Vec::new(),
         false,
+        None,
     )
     .await?;
     let codex = Arc::new(codex);