The task of safeguarding the embalmed corpse of Vietnam’s revolutionary leader Ho Chi Minh is gruelling: carefully selected riflemen work around the clock, watching over the communist nation’s founding father who died 50 years ago on Monday.Protecting him is the ultimate patriotic service for men in stiff white uniforms at Ho’s towering tomb in Hanoi, a monolithic shrine to a man who still pervades public life despite his fading relevance among the youth.The job is a “dream come true” for guard…