The image shipped a hard pin (@earendil-works/pi-coding-agent@0.78.0) while
'pi upgrade' on hosts had moved to 0.80.2, so builds lagged. Switch Pi to the
@latest dist-tag so every image bundles the newest Pi.
To keep the floating spec traceable, record the version that actually got
fetched in build-manifest.json as pi_version, derived from the bundled tarball
name (earendil-works-pi-coding-agent-<version>.tgz) after fetch+install.
fetch-npm-globals.sh now also echoes the resolved tarball so the build log
shows the version a dist-tag resolved to.
Other globals (bw) stay pinned. Image is node24, compatible with current Pi
(the legacy-node20 dist-tag is for node20 only).
Verified: fetch resolves @latest → 0.80.2; version extraction matches npm.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
