SpaceX's first earnings report since its record-breaking IPO will provide an early gauge of whether Starlink's profits can sustain the company's rapidly growing spending on AI ?and space ventures.Due after the market closes on Tuesday, the results ?will give SpaceX's limited pool of public investors their first chance to judge whether the financial case behind the company's lofty ?valuation supports CEO Elon Musk's vision of a powerhouse spanning AI, space and telecommunications.Musk has pitched AI as SpaceX's future growth engine, with ambitions extending beyond renting compute capacity to other companies to developing frontier models, consumer and enterprise software, and, eventually,...