Ezequiel Powell, an Inverness boy who was diagnosed with a rare form of childhood cancer a year and a half ago, finished his chemotherapy and radiation treatment in February, and his vigor is quickly returning. “He really has almost a different personality now,” said his mother, Alex Porrata. “He’s able to interact with people. He’s open. He’s full of joy and life.” In other words, it’s a pretty good time for a party. Next month,…