Ah great you’ll be flying so. Probably should have spotted that, but it’s been a good while since I’ve looked at it.
There is another option to polling farmOS for changes that you may be interested in if you fancy getting your hands dirty with some code.
I started a discussion here: External notifications, webhooks, MQTT etc - #16 by Farmer-Ed and have some working code. Which again I haven’t looked at in a good while and probably needs some tidying still or redesign to fit in with Core farm_notification module