Not debuggable if GH app fails to handle webhooks

If backend fails on webhook handling (e.g. fails to find org in the db) then there is no way for the user to debug and fix this

The current workaround is to commit a change to digger.yml to main but how would the user know?

Solution: fetch digger.yml from the branch, always (will also solve the issue with using it from main not branch)

Related to #926 