Stability AI, which has emerged as a poster child for investors’ rush to back unproven artificial intelligence startups, has talked to at least one potential buyer in recent weeks about a sale as its faces a cash crunch, according to a person involved in the conversations.The four-year-old startup raised at least $101 million from marquee investors including Coatue Management and Lightspeed Venture Partners. It fetched a $1 billion valuation in 2022 on early fanfare for Stable Diffusion, an open...