Carlos Fernández de Cossío, Cuba’s deputy foreign minister, at the Fidel Castro museum in Havana on June 30, 2026. Fernández de Cossío called accusations against Raúl G. Rodríguez Castro involving a smuggling ring “slander.” (Lisette Poole González/The New York Times) By DAVID C. ADAMS and FRANCES ROBLES Raúl Castro was on an official state visit in Paris a decade ago as Cuba’s president when a hulky bodyguard in his entourage stood out. The man kept so close to Castro while they walked the…