ax:extract-workflow - reconstruct the recipe behind a shipped artifact

Given a deliverable (a demo, a PR, a feature) the user wants to know: what skills, in what order, produced it? This skill resolves an anchor (date or sha), windows the relevant sessions, and narrates the ordered skill arcs in plain text. Eats its own dogfood: it is itself a framing skill.

Assumes ax (axctl) is on PATH. If ax sessions here fails, tell the user to check docs/development.md#setup (DuckDB dylib setup - no daemon required) and stop.

When to fire