One-Word Repo: Event Production Runbook

Create an event production runbook in repo files. Artifacts: /ops/event/overview.md, /ops/event/run-of-show.md, /ops/event/vendors.md, /ops/event/budget.md, /ops/event/outreach.md, /ops/event/postmortem.md. Constraint: include timelines, owners, and checklists; make it copy/paste-ready.