Email and in-app notification when proof fails to generate

Description - Send a notification to the document/proof owner if the proof fails to generate.

Why is this feature important to you - Right now, unless the user waits for the proof to generate before continuing with their other work, which can take quite a while sometimes, they have no idea if the proof failed to generate which can slow down work.

How would you like the feature to work - If the proof fails to generate it sends an email and in-app notification to the proof owner that the proof failed to generate.

Current Behaviour -no notification is sent if the proof fails to generate.