articulated_object/Writer: fixing attachment

source/RobotAPI/libraries/armem_objects/client/articulated_object/Writer.cpp

@@ -232,6 +232,7 @@ namespace armarx::armem::articulated_object
 
         objectInstance.pose.objectID = cs;
         objectInstance.pose.providerName = properties.providerName;
+        objectInstance.pose.attachmentValid = false;
 
         update.instancesData = {objectInstance.toAron()};
         update.referencedTime   = timestamp;