hello! we’re looking at migrating to SpiceDB as the source of truth for our offline-first mobile app with quite a complex permission set (in the magnitude of 1000s). do you have any recommendations on how we may do this? we’re currently pre-fetching all permissions for a user on app load, but we’ve not yet found an efficient way of constructing that data in a timely manner using SpiceDB. lookupResources and checkBulkPermissions are what we've looked into so far, but we're wondering if we're missing a trick somewhere? thanks in advance!