SAN FRANCISCO — State corrections officials cannot impose blanket lifetime restrictions on where sex offenders may live, the California Supreme Court ruled Monday in a case challenging a voter-approved measure that prohibits sex offenders from living within 2,000 feet of a school or park. The court restricted its decision to San Diego County, where the case originated. But the ruling has potential statewide impact with lawsuits in other counties likely, said Laurie Levenson, a criminal law professor at Loyola …