v0.29.2

Presentation decks: adds a model-economics beat to the AAR (building-a-product-knowledge-graph), product/design, and how-rks-works decks — covering how work starts on a small model, retries before escalating, escalates by resuming rather than restarting, and caches prompt/tools/turns, with spend and a waste ratio reported per unit of work. Each beat is audience-tailored and bounded to what the shipped code does.

Also carries the marketing-site surface from 0.29.1 (UX287 logo, enlarged header lockup, self-hosted Overpass Black wordmark, Plausible analytics, and the Model economics pane) to a deployable state: 0.29.1's production deploy was blocked because commit authorship resolved to a stale repo-local git identity rather than the project owner. The identity is corrected; this release is the first authored correctly.