The battle over Zappos founder and former CEO Tony Hsieh’s fortune has taken a forensic turn in the wake of the shoe magnate’s death following a Connecticut house fire. The former Zappos CEO was widely believed to have died without a will after he succumbed to injuries from a 2020 fire at age 46. But a purported seven-page will, dated March 2015, suddenly arrived by mail at a Las Vegas courthouse last year, setting off a mystery that now sits at the center of his estate fight, The Wall Street…