Currently we're tracking message updates and displaying groups that are being processed. When a `MessageUpdate` job fails or times out, we add an error log but that is not actionable or easy to look back on. Eventually we want to stop imports / exports from translatewiki.net based on these failures, so it's important to display them clearly to translation administrators.
This could be done by,
Display current failures to administrators on `Special:ManageMesageGroup` with the list of groups, and the message updates that failed in a dialog.
* Each message listed should link to the message on the wiki, it's history
* For the group it would be useful to have the remote repository URL
Track historical data via [[ https://www.mediawiki.org/wiki/Manual:Logging_to_Special:Log/en | Special:Log ]]. Eventually when administrators mark failures as fixed it can be tracked here as well.