didDeploy hook to publish changes

hi I would like to see something like pub/sub when deploying changes, so when a `didDeploy` event happens this add-on can exec a `PUBLISH ${keyPrefix}:deploy ${revisionKey}` and a fastboot-notifier can be listen on that channel events and trigger a notification to download the new app version. let me know if that sound good to you and if I can help implementing this. thanks