LONDON–A multi-billion-dollar, supposedly “sanctions-proof” international payment system backed by the Kremlin and sanctioned by the West, has been associated with a business in downtown Budapest – staffed by a Latvian go-karting enthusiast – since December 2024.  Leaked documents corroborated by reporter.london with open-source reporting suggest there is a risk that Hungarian company MiddleAsiaTrade House kft,…