Rewrites the Node.js release classification pipeline in Go. webicached
fetches upstream releases (GitHub, Gitea, GitLab, HashiCorp, custom
sources), classifies assets by OS/arch/variant, and writes legacy-format
JSON caches compatible with the existing webinstall.dev API.
Git-clone packages emit git_tag and git_commit_hash from real repo
clones — no fabricated refs.
