A Long Island father is begging lawmakers to restore long-stalled federal funding that, if left unresolved, would shutter the only lab capable of treating his five-year-old son’s rare genetic disorder. Andrew Jedlicka, an NYU business professor and father of three living in Merrick, has been taking his youngest child to a Long Island City lab over the last five months to receive a new experimental treatment he said could fully cure his son of KBG syndrome — a rare genetic disorder linked to developmental delays, speech issues and seizures that the boy was diagnosed with last year.