fix(packaging): verify bundled startup dependencies

main.py

@@ -18,5 +18,15 @@ if PROJECT_ROOT not in sys.path:
 from app.gui import main
 
 
+STARTUP_SMOKE_TEST_ARG = "--startup-smoke-test"
+
+
+def _entrypoint(argv=None):
+    args = sys.argv[1:] if argv is None else list(argv)
+    if STARTUP_SMOKE_TEST_ARG in args:
+        return 0
+    return main()
+
+
 if __name__ == "__main__":
-    raise SystemExit(main())
+    raise SystemExit(_entrypoint())