Function serve_axum 

pub async fn serve_axum<S>(port: u16, state: S) -> Result<()>
where
    S: RewardApi + AvailabilityApi + HotShotAvailabilityApi + RewardApi + DataApi + ConsensusApi + Clone + Send + Sync + 'static,

Start Axum HTTP server with combined v1 and v2 APIs

This serves both APIs at /v1/* and /v2/* from a single state implementation.