Function pick_github_release 

pub fn pick_github_release(
    api_base: &str,
    repo: &str,
    selector: &ReleaseSelector<'_>,
    token: Option<&str>,
    filter: Option<&dyn Fn(&GitHubRelease) -> bool>,
) -> Result<GitHubRelease, GitHubError>

Fetch repo’s releases and pick the one matching selector. Drafts are always skipped; filter further narrows candidates first — use it when the loader needs specific assets present, so Latest falls through to the newest release that actually qualifies.