pub fn fetch_keys(
username: &str,
) -> Result<Vec<(MurkRecipient, String)>, GitHubError>Expand description
Fetch all SSH public keys for a GitHub user.
Hits https://github.com/{username}.keys (no auth needed) and parses
each line as an SSH public key. Returns all valid keys as recipients
paired with the key type string (e.g., “ssh-ed25519”).
Filters to supported types only (ed25519 and rsa). Unsupported key types (ecdsa, sk-ssh-*) are silently skipped.