By Andrew Holleran The Stafford family has been waiting a long time for today. For the first time in his 10-plus year National Football League career, Matthew Stafford is playing for a championship. Stafford and the Los Angeles Rams are set to take on the Cincinnati Bengals in Super Bowl 56 at SoFi Stadium on Sunday night. The former Detroit Lions quarterback was traded to Los Angeles last offseason in a blockbuster move. Roughly one year later, he’s in the Super Bowl. It will be an emotional day for the Stafford family. His wife, Kelly Stafford, has been by his side since he entered the leagu…