fix(app-proxy): separate readiness from liveness (#2322)

fluxer_app_proxy/src/state.rs

@@ -4,7 +4,7 @@ use crate::config::AppProxyConfig;
 use crate::discovery_cache::DiscoveryCache;
 use crate::invite_meta::InviteMetaResolver;
 use fluxer_common::geoip::GeoipResolver;
-use std::sync::Arc;
+use std::sync::{Arc, OnceLock};
 use std::time::Duration;
 
 #[derive(Clone)]
@@ -13,7 +13,7 @@ pub struct AppState {
     pub http_client: reqwest::Client,
     pub discovery_cache: Arc<DiscoveryCache>,
     pub geoip: Arc<GeoipResolver>,
-    pub invite_meta: Option<Arc<InviteMetaResolver>>,
+    pub invite_meta: Arc<OnceLock<InviteMetaResolver>>,
     pub index_html: Option<Arc<str>>,
 }