Points to cover:
* What happened two weeks ago, that Ext:ORES exacerbated T179156.
* Incident report for T181006.
* Emergency protocols for keeping critical pages such as Special:RecentChanges up even when Ext:ORES fails.
* Ext:ORES and the architecture that makes it fragile
* How to maintain latest production rollback SHA-1 even when using tin to deploy to multiple clusters.
* Document protocol for watching both "client" (MW/Ext:ORES) and server-side errors during deployment.