The Buffalo Sabres pulled off one of the most significant pre-draft trades in recent memory on Tuesday night, shipping defenseman Bowen Byram to the Chicago Blackhawks. The return was impressive, headlined by the fourth overall pick. But the real story behind the deal paints a much more complicated picture for the franchise.According to reporter Heather Engel, Sabres general manager Jarmo Kekalainen revealed that the organization made a genuine …