pub fn verify_controller_challenge(
agent_id: &AgentId,
challenge: &str,
signature: &str,
) -> Result<()>Expand description
Verifies a controller registration proof (Agent Delegation Section 4.3):
signature over the challenge’s exact UTF-8 bytes under the strict rules of
Section 3.1. Matching the challenge to what the provider issued, and its
expiry, remain the provider’s checks.