Function commit_signer_trailers 

pub fn commit_signer_trailers(raw_commit: &str) -> Option<(String, String)>

Extract (root_did, device_did) from a commit’s Auths-Id / Auths-Device trailers. Returns None when either trailer is absent (a commit not signed by auths).

Args:

• raw_commit: The raw git commit object (headers + message).

Usage:

if let Some((root, device)) = commit_signer_trailers(commit) { /* trusted? */ }