## Why
Skill invocation analytics only needs the repository's origin URL, but
`collect_git_info` also checks the repository and reads its commit and branch.
## What changed
Extract and export `get_git_origin_url` and use it directly in skill analytics
to skip the extra Git commands. Reuse the helper in `collect_git_info`,
preserving URL sanitization and command timeouts.
GitOrigin-RevId: f878936937d0ff8c6313bb8168448e0b25ba1a39