GENEVA — Australia violated the rights of asylum-seekers arbitrarily detained on the island of Nauru, a U.N. watchdog ruled Thursday, in a warning to other countries intent on outsourcing asylum processing. The U.N. Human Rights Committee published decisions in two cases involving 25 refugees and asylum-seekers who endured years of arbitrary detention in the island nation. “A state party cannot escape its human rights responsibility when outsourcing asylum processing to another state,” committee member Mahjoub El Haiba said in a statement. Under a hard-line policy introduced more than a decade ago, Australia has sent thousands of migrants attempting to reach