MIAMI — In recent years, the start of NBA free agency has been a Miami Heat frenzy. In 2019, the team reached an agreement with Jimmy Butler before fully securing the salary-cap space needed to close such a deal. In 2021, the Heat’s overtures to Kyle Lowry were deemed by the NBA to have been made prematurely, costing the team a 2022 second-round pick. And last summer, the Philadelphia 76ers were handed a similar penalty for prematurely luring P.J.