MIAMI — Pat Riley celebrated an anniversary Monday, one with the Miami Heat, and also one, fitting in the timing, with Micky Arison. “He,” Riley said Monday of the Heat owner, “saved, basically, my coaching life.” On Sept. 1, 1995, the Heat traded a first-round pick and $1 million to the New York Knicks for the rights to make Riley their franchise steward. The following day, a 30-year …