BRUSSELS — Ireland faces the daunting task of forging an agreement on the EU’s next seven-year budget in the next six months, ahead of an election year across Europe that could throw negotiations into disarray. It’s a job that looks even tougher after wealthy countries killed a June negotiating proposal from Cyprus. Nicosia hands the rotating presidency of the Council of the EU — and responsibility for budget negotiations — to Dublin on July 1.  The Commission’s budget proposal — worth nearly €