Way back in the late 1970s, William Miloski was apprehensive about the future of Miloski’s Poultry Farm, a property now worth millions to developers. Almost 50 years later, the next generation of poultry-farming Miloskis says Granddad can rest easy — they aren’t going anywhere. “I plan on dying here,” says Mark Miloski Jr., gazing into the distance at his family’s 30-acre turkey farm in Calverton, where there’s nothing taller than the tree line and the poults have the run of the wide-open space.