As voters bite their nails over close national competitions, the results of Marin’s local elections are coming into focus. Thousands of vote-by-mail ballots, including any that are postmarked by Election Day and arrive by Nov. 15, have yet to be counted. But preliminary results indicate that Measure O was defeated handily by Inverness voters. More than 76 percent rejected the wildfire prevention parcel tax, which came with high-profile endorsements but drew doubts from the Inverness…