Function resolve_identity_requirements 

pub async fn resolve_identity_requirements(
    context: &impl IdentityContext,
    requirements: &BTreeSet<IdentityRequirement>,
) -> Result<(), IdentityDependencyError>

Resolve every requirement of one parent and return one result for it. Each round loads the logs of every still-missing inbox in one request and checks each proof once, so absent references share one window. Successful primary reads must cover the full absence interval. A transport or verification error stops the interval and leaves dependent work pending. One failed proof does not cancel other checks or remove their verified cache entries.