Function collect_release_evidence 

pub fn collect_release_evidence(
    client: &GitHubClient,
    owner: &str,
    repo: &str,
    base_tag: &str,
    head_tag: &str,
) -> Result<EvidenceBundle>

Collect all evidence for a release (backward-compatible convenience wrapper).

Calls all three phases sequentially. Prefer the individual phase functions when progressive output is desired.