failover: add disabled handler argument to game post manager if something goes wrong

[sudojunior]

Sometimes permissions can be removed without warning, and the service likely isn't prepared for that. There is a possibility to listen for each channel as a pre-emptive measure, or go the faster route and hit a 403 instead and then disable the handler instance. Logic to handle all components would also need to use this to catch any additional interactions before they can be run (if the failover code is active).