A youth development specialist at a Brooklyn juvenile detention center will spend a year and a day behind bars for smuggling in contraband including a crushed-up prescription painkiller that caused one of the young detainees to suffer a non-fatal overdose, according to the feds. Da'Vante Bolton, 32, of Queens, was sentenced Wednesday in Brooklyn Federal Court, after pleading guilty last year to taking bribes to smuggle pot, pills and scalpels into the Crossroads Juvenile Center in Brownsville,