Function humanize_api_error_with_reset 

pub fn humanize_api_error_with_reset(
    status: u16,
    body: &str,
    reset_hint: Option<&str>,
) -> String

Like humanize_api_error but surfaces a known rate-limit reset time in the 429 message so the failure is honest rather than cryptic. reset_hint is a human-readable duration string, e.g. "47s".