Add central live map backend: chunk/player ingest, Vantage sidecar supervisor and proxy

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

panel/server/tests/common/mod.rs

@@ -22,8 +22,13 @@ pub struct TestApp {
 }
 
 pub async fn setup() -> TestApp {
+    setup_with(|_, _| {}).await
+}
+
+/// Like [`setup`], letting the test adjust the config (given the data dir).
+pub async fn setup_with(tweak: impl FnOnce(&mut Config, &std::path::Path)) -> TestApp {
     let dir = tempfile::tempdir().unwrap();
-    let cfg = Config {
+    let mut cfg = Config {
         bind: "127.0.0.1:0".into(),
         data_dir: dir.path().to_path_buf(),
         web_dir: dir.path().join("web"),
@@ -34,7 +39,11 @@ pub async fn setup() -> TestApp {
         max_upload_mb: 64,
         public_url: Some("https://panel.test".into()),
         trusted_proxies: vec!["127.0.0.1".parse().unwrap()],
+        vantage_bin: None,
+        vantage_assets: None,
+        vantage_args: vec![],
     };
+    tweak(&mut cfg, dir.path());
     let pool = db::connect_memory().await.unwrap();
     let state = build_state_with_keys(cfg, pool, test_keys()).await.unwrap();
     bootstrap_admin(&state).await.unwrap();