ALBANY, N.Y. — An upstate judge signed off late Friday on a new set of congressional and state Senate maps drawn up by a court-appointed expert tasked with crafting nonpartisan boundaries. The new districts were finalized one month after the state’s highest court scrapped lines drawn up by Democrats earlier this year, determining that they unconstitutionally gerrymandered maps and failed to follow the proper redistricting process. Steuben County Supreme Court Judge Patrick McAllister pushed back on criticisms that the final product favors Republicans as he defended the work of special master J…