Google headquarters in Mountain View, California.Photographer: David Paul Morris/BloombergAlphabet Inc.’s Google had $811 billion in contracted future spending commitments at the end of June, up nearly $500 billion from just three months earlier.The obligations, disclosed separately from Alphabet’s capital expenditure budget, represent purchases the company has already committed to making under supply agreements and open purchase orders. Roughly $200.7 billion of the total were short-term, Googl...