By Conor Orr Breaking down the major signings as they happen. Mitch Trubisky, Alex Cappa, Chase Edmonds and more. Responsible free-agent spending is a pipeline to the Super Bowl, which is something that sounds obvious but may not always have been. The difference between teams’ merely splurging in free agency versus actually being good at it is the link between the pro scouting department and the coaching staff. I spoke with Bengals folks before the Super Bowl who were wondering why everyone (ahem, myself included) predicted they’d win so few games in 2021. They were thrilled with the idea of p…