DORAL, Fla. — The perks that come with winning a PGA Tour event are numerous, and it goes far beyond the big paycheck. Alex Fitzpatrick was oblivious to all of it. He had played in the Zurich Classic of New Orleans the past few years with his brother, Matt, the former U.S. Open champion who is firmly entrenched on the PGA Tour. Alex, 27 and younger by four years, didn’t have the kind of security that Matt had due to his U.S. Open win and being ranked among the top players in the world. Alex won the Hero Indian Open recently on the DP World Tour to give himself a playing window into next year, but coming to America was more centered around bonding than career goals. That changed on Saturday afternoon and into the evening and the wee hours of the morning. “The week was really about playing with my brother, spending time with my brother and enjoying time as a family,” Alex Fitzpatrick said Tuesday at Doral, where he is an unexpected participant in this week’s Cadillac Championship .…