Context

When an uncaught exception happens in the PR updater, we would like to learn about it.
Example: We try to trigger a code flow subscription and there's some kind of a problem and we are not even able to create a PR branch because of a conflict. We need to get some sort of an alerting.

Goal

• Create a new custom event which will fire when a background work item throws an uncaught exception.
• Create a Grafana panel with alerting watching for these events and alert if there are any.
  • Both the dashboard and the alert wiki should have a link to a query that lists these events so that it's easy to navigate to a list of them (an AI query maybe).

Release Note Category

• Feature changes/additions
• Bug fixes
• Internal Infrastructure Improvements

Release Note Description

Skip in release notes since it's PCS work