Sam Altman was ousted and then restored as OpenAI’s chief executive. Photo: Dustin Chambers/Bloomberg NewsThere’s a new task on the 2024 to-do list for founders: Make sure you can’t get Altmaned. While startups have ousted leaders before, the entrepreneur world was stunned to see the board of hot artificial-intelligence company OpenAI fire Sam Altman just before Thanksgiving. He had been the face of one of the biggest successes of the year and suddenly he was out. In startup land, founders and a...