feat(stats): add user group usage views

apps/aether-gateway/src/control/route/admin/observability_families.rs

@@ -596,6 +596,20 @@ pub(super) fn classify_admin_observability_family_route(
             "admin:stats",
             false,
         ))
+    } else if method == http::Method::GET
+        && matches!(
+            normalized_path,
+            "/api/admin/stats/leaderboard/user-groups"
+                | "/api/admin/stats/leaderboard/user-groups/"
+        )
+    {
+        Some(classified(
+            "admin_proxy",
+            "stats_manage",
+            "leaderboard_user_groups",
+            "admin:stats",
+            false,
+        ))
     } else if method == http::Method::GET
         && matches!(
             normalized_path,

apps/aether-gateway/src/control/tests/admin_stats.rs

@@ -157,6 +157,28 @@ fn classifies_admin_stats_leaderboard_models_as_admin_proxy_route() {
     assert!(!decision.is_execution_runtime_candidate());
 }
 
+#[test]
+fn classifies_admin_stats_leaderboard_user_groups_as_admin_proxy_route() {
+    let headers = headers(&[]);
+    let uri: Uri = "/api/admin/stats/leaderboard/user-groups"
+        .parse()
+        .expect("uri should parse");
+    let decision =
+        classify_control_route(&http::Method::GET, &uri, &headers).expect("route should classify");
+
+    assert_eq!(decision.route_class.as_deref(), Some("admin_proxy"));
+    assert_eq!(decision.route_family.as_deref(), Some("stats_manage"));
+    assert_eq!(
+        decision.route_kind.as_deref(),
+        Some("leaderboard_user_groups")
+    );
+    assert_eq!(
+        decision.auth_endpoint_signature.as_deref(),
+        Some("admin:stats")
+    );
+    assert!(!decision.is_execution_runtime_candidate());
+}
+
 #[test]
 fn classifies_admin_stats_leaderboard_users_as_admin_proxy_route() {
     let headers = headers(&[]);