dashboard: add progress log documentation and ? button on page heading
- src/docs/progress-log.md: covers append-only constitution §5 guarantee,
event structure (all fields), standard + convention event types, session
protocol, MCP and curl usage, filters, and the 30-day volume chart
- progress.md: withDocHelp applied to #observablehq-main h1 → ? button
appears on hover over the 'Progress Log' page heading
- observablehq.config.js: Progress Log added to Reference nav section
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
tegwick
f829bed6b2