Discord community: role sync, announcements webhook, launcher invite

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DjMbLQujBHunCCu5GpsHaT

panel/server/src/main.rs

@@ -23,6 +23,7 @@ async fn main() -> anyhow::Result<()> {
     let state = build_state(cfg, pool).await?;
     bootstrap_admin(&state).await?;
     state.livemap.spawn_reaper();
+    scopenet_panel::routes::discord::spawn_worker(state.clone());
 
     let listener = tokio::net::TcpListener::bind(&bind).await?;
     tracing::info!("SCOPENET panel v{} listening on http://{bind}", env!("CARGO_PKG_VERSION"));