test: verify freecad auto routes survive reopen

tests/manual/freecad_auto_routing_smoke.py

@@ -87,6 +87,16 @@ def main():
     }
 
     doc.saveAs(OUT_FCSTD)
+    App.closeDocument(doc.Name)
+    reopened = App.openDocument(OUT_FCSTD)
+    routed_group = reopened.getObject("QETWiring_04_Routed")
+    reopened_wires = list(getattr(routed_group, "Group", []) or []) if routed_group else []
+    payload["reopened_routed_wire_count"] = len(reopened_wires)
+    payload["reopened_has_auto_route"] = any(
+        (getattr(wire, "RouteType", "") or "").strip() == "AutoSuggested"
+        for wire in reopened_wires
+    )
+
     with open(OUT_JSON, "w", encoding="utf-8") as handle:
         json.dump(payload, handle, ensure_ascii=False, indent=2)
     print(json.dumps(payload, ensure_ascii=False, indent=2))