Geo: Allow GraphQL queries and mutations for Geo in maintenance mode

Summary

Maintenance Mode should ideally not block these queries. These queries can only be run by admins, and they are legitimate queries in some contexts, like Geo failover:

Turn on Maintenance Mode

Let Geo get to 100% synced and verified

Something is failing to sync

Resolve the underlying problem

Trigger a resync (for example in Admin UI, which would use this GraphQL query)

100% synced and verified

Failover

Turn off Maintenance Mode