add new app for systemd monitoring

modules/modules.nix

@@ -10,6 +10,7 @@
     ./core/ssh-bootstrap.nix
     ./core/sovran-manage-domains.nix
     ./core/sovran_systemsos-desktop.nix
+    ./core/sovran-hub.nix
 
     # ── Always on (no flag) ───────────────────────────────────
     ./php.nix
@@ -31,4 +32,4 @@
     ./bitcoin-core.nix
     ./rdp.nix
   ];
-}
+}