MIAMI — Five takeaways from the Miami Heat’s 118-105 loss to the Phoenix Suns (27-20) on Monday night at Kaseya Center to begin a quick two-game homestand. The Heat (24-23),which has lost seven straight games, continues the homestand on Wednesday against the Sacramento Kings: The Heat is now in the middle of its longest losing skid in more than 15 years.This is the Heat’s first seven-game skid since late in the 2007-08 season — a season that Miami finished with the NBA’s worst record at 15-67. The Heat traded Shaquille O’Neal to the Suns during this rough season. This is also the Heat’s first …