A competitor has filed a protest against Parkside Cafe owner John Gilbert’s application for a liquor license. August Temer, the co-owner and executive chef at two other Stinson Beach restaurants, submitted the protest to the state’s Department of Alcoholic Beverage Control last month. He argued that allowing the Parkside to serve hard liquor would cause problems for the community, and that the town already has enough bars. “Why is it needed?,” Mr. Temer asked in…