Function ingest 

pub async fn ingest<S, V>(
    actor: &Actor<S, V>,
    log: &dyn LogStore,
    services: Arc<S>,
    thread_id: &str,
    fact: NewFact,
    limit: u32,
) -> Result<Settlement<V>, Exit<ActorError>>
where
    S: Send + Sync + 'static,
    V: 'static,