Function publish 

pub fn publish(
    forge: &dyn Forge,
    req: &Request,
    review_head: &str,
    batch: &Batch,
) -> Result<PublishOutcome, ForgeError>

The whole publish, forge side: ask the forge where the request is now, refuse if it moved, send the batch, fetch the threads again.

One function so the reviewer and dfr findings --post cannot order these differently. It runs on whichever thread the caller chooses; it touches nothing of the review’s.