When the BotRunner calls getPeriodicItems, any failure will terminate the whole loop. This means that one misconfigured repository, or problem with the forge, can prevent all other repos from being processed. I think it would be a good idea to keep trying each bot instance in the list even if some of them fail.

We currently have an outage with GitHub that is causing some repos to fail the query for pull requests, but that shouldn't prevent other repos from being processed.