Longtime Bolinas educator Leo Kostelnik will become the permanent superintendent at the Bolinas-Stinson Union School District, after filling in on an interim basis since last June. The school board voted unanimously to appoint him last week. “We believe Leo Kostelnik is an excellent fit for our school,” the board wrote in a statement. “[We are] delighted to have such a well-qualified, experienced person in this important position.” A Bolinas resident and published author, Mr. Kostelnik…