Masayoshi Son, CEO of SoftBank, speaks during the company's annual general meeting in Tokyo on June 20, 2024.Kosuke Okahara | Bloomberg | Getty ImagesSoftBank Group shares hit a record high on Thursday, just as the company's massive tech investment arm shows signs of recovery and its outspoken founder Masayoshi Son emerged back into the public spotlight to align the Japanese giant to a future in artificial intelligence.The firm has also been helped by the public market success of British chip de...