More accurate vote results across the archive

We corrected 422 vote records that showed misleading tallies: 397 votes displayed as "passed 0-0" when the count was simply not in the source minutes (they now honestly show no tally), and 25 votes whose counts were impossible for the body's size (often digits bleeding in from resolution numbers). We also removed duplicate agendas, duplicate attendance rows, and placeholder names that crept in from documents — and added guards so none of these can recur.