feat(node): configure system environment through the desktop workflow

apps/node-agent/packaging/preinst

@@ -1,9 +1,18 @@
 #!/bin/sh
 set -eu
 if [ "$1" = install ] || [ "$1" = upgrade ]; then
+  if [ -d /run/systemd/system ]; then
+    mc_node_environment_state=$(systemctl show --property=ActiveState --value mission-core-node-environment.service 2>/dev/null || true)
+    case "$mc_node_environment_state" in
+      active|activating)
+        echo "Mission Core Node: дождитесь завершения настройки окружения в приложении." >&2
+        exit 1
+        ;;
+    esac
+  fi
   . /etc/os-release
   if [ "${ID:-}" != ubuntu ] || [ "${VERSION_ID:-}" != 24.04 ]; then
-    echo "Mission Core Node: this package requires Ubuntu 24.04 LTS Desktop amd64." >&2
+    echo "Mission Core Node: this package does not support the installed system." >&2
     exit 1
   fi
 fi