Goldman Sachs CEO David Solomon released his annual letter to interns.ECNYBusiness Insider got an exclusive look at David Solomon's annual letter to interns.The 2026 class includes around 2,500 interns, with an acceptance rate of less than 1%.Solomon advised interns to "manage your energy" on the same day as SpaceX's IPO, which the bank led.Goldman Sachs' youngest employees are walking into an "innovation supercycle."CEO David Solomon said as mu…