BREAKING: Lily, a 24-year-old waitress, had no idea she was serving NFL head coach Dan Campbell. Kind and discreet, Dan Campbell enjoyed his meal without drawing attention. But as he left, he placed a folded bill on the table and walked out with a smile. Curious, Lily opened the bill and immediately broke down in tears just a few minutes later. Dan Campbell’s post wasn’t just a thank-you; Lily, sobbing, told reporters that it had changed her life…