There’s a lot of sci-fi streaming this summer Cassian Bilton and Lee Pace in season 2 of Foundation. | Image: AppleIt’s already been a pretty eventful summer for science fiction fans. Last week saw the finale of Apple’s post-apocalyptic series Silo, Strange New Worlds season 2 is keeping Star Trek going through August, and Disney Plus is still in the midst of Secret Invasion, its alien cons…