A record may leave its lists some time after reaching a state: leaves_after

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GT37Z1Xtfd9pUuQtMTg6Yt

src/main.rs

@@ -132,6 +132,7 @@ async fn serve() -> anyhow::Result<()> {
     // windows (see announce.rs).
     tokio::spawn(portal::announce::run(state.clone()));
     tokio::spawn(portal::deadlines::run(state.clone()));
+    tokio::spawn(portal::deadlines::run_leaving(state.clone()));
     // The accounts the content mandates: the first person in, and
     // everyone a page names as responsible, at start and whenever the
     // content changes (seed.rs).