Hinge Health Inc., a provider of digital physical therapy, is aiming to file for an initial public offering as soon as next week, according to people familiar with the matter.The San Francisco-based company could go public as early as April, the people said, asking not to be identified as the information isn’t public. Hinge Health had revenue of $390 million last year, up about a third from 2023, one of the people said. It had free cash flow of $45 million in 2024, the person said....