Additional webhook information

### Problem Statement

I have a Sentry integration shipped to Google Cloud Functions. For some reason I sporadically get timeouts there. The volume has increased so much ,that the integration is getting disabled every now and then, because the 1000 timeouts per 24h is crossed. What I'm missing is:

1. A notification saying that the subscription to errors has stopped working.
2. Identification of what error has caused timeouts - only timestamp is available now:

### Solution Brainstorm

Ad 1. Send the notifications about the subscription being turned off via email
Ad 2. Add the Error ID (or Event ID) so I'm able to investigate and rerun the webhook locally. Maybe the event is particularly large, which takes a while to parse.

### Product Area

Settings - Integrations