Rescans the conf directory at the start of each batch loop so new
{pkg}/releases.conf files dropped on disk are picked up without a restart.
Also runs a rescan after each individual package refresh mid-batch. If a
new conf is discovered, the inner loop breaks immediately so the outer
loop recomputes staleness — new packages have a zero timestamp and sort
to position 1, meaning they are fetched in the very next slot.
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.
