Alert Webhook improvements (#1703) #2047

Job	Run time
typecheck / typecheck	3m 49s
units / 🧪 Unit Tests	2m 59s
publish-worker / build (coordinator)	1m 33s
publish-webapp / publish	2m 3s
publish-worker / build (docker-provider)	1m 0s
publish-worker / build (kubernetes-provider)	42s
	12m 6s

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