Tracker for upstream OpenFGA transaction datastore intergration #3205

Currently, we have pinned the OpenFGA library at goose migration version 6 and created our own Transactional Datastore wrapper: https://github.com/agent-substrate/substrate/blob/main/cmd/ateapi/internal/authz/datastore.go to pass parent application Tx to Read and Write API. Long term we want to remove this wrapper and directly integrate with the upstream change: https://github.com/orgs/openfga/discussions/574#discussioncomment-18545594.