MINNEAPOLIS — A federal judge ruled Wednesday that Minnesota’s sex offender treatment program is unconstitutional, saying it violates the “fundamental rights” of more than 700 people locked up indefinitely after completing their prison sentences.U.S. District Judge Donovan Frank sided with patients who were civilly committed to the Minnesota Sex Offender Program and argued that they had little hope for freedom. In more than 20 years of existence, no one has been fully discharged from the program, even those thought to be …