Function maybe_send_audit 

pub async fn maybe_send_audit(
    kafka_opt: Option<&Kafka>,
    token: &str,
    message: impl Into<String>,
    host: Option<Value>,
    group: Option<Value>,
)

Send an audit message if a Kafka instance is configured.

This is a convenience wrapper around send_audit that handles the common if let Some(kafka) = kafka_opt { ... } pattern found at every audit call site.