By Ben Aris in Berlin Once the Armed Forces of Ukraine (AFU) took its first Russian railway station inside Russia it was in the position to cause chaos and glean valuable troop movement intel. “Russia has a fully digitised railway system, so once you access the system of any train station, no matter how small, you have access to the entire network,” Paul Con, a Ukraine observer, said in a social media post. The AFU breakthrough has led to a severe disruption in railway operations, paralysing key routes across the country. The central office of Russian Railways (RZD) has urgently requested the …