An appearance by the teenage daughter of North Korean leader Kim Jong-un at a sacred palace has renewed scrutiny on whether she is being groomed for succession in the secretive regime.Kim Ju-ae, believed to be around 13 years old, made her first recorded visit on Thursday to the Kumsusan Palace of the Sun, the holiest site in the country dedicated to its hereditary rule, sparking speculation she could receive an official title at a coming party congress.While some observers see her prominent...