By Thomas Peter KHARKIV, Ukraine (Reuters) – In a Ukrainian city battered by bombs since the start of Russia’s invasion, Natalia Shaposhnik and her daughter Veronika live in a blue and yellow train parked in a metro station deep underground. For four long weeks, Shaposhnik and hundreds like her have hunkered down inside the station in the north of Kharkiv, Ukraine’s second largest city. With destroyed or heavily damaged buildings on almost every block, the streets were eerily quiet and empty above ground on Thursday. Down in the station, families crowded together, most of them from the city’s …