native-builder.mjs now uses Docker for all kernel builds: 1. docker build (cached layers) 2. docker run (compile in container) 3. docker cp (extract vmlinuz) 4. upload-release.sh (push to CDN) No more build-and-flash.sh, no native-cache symlinks, no musl/gcc issues. Oven only needs Docker + git + curl. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>