If we're running on PG and want to stick with it, but have a primary/replica setup in multi-region, can we self-host spicedb to split reads/writes between read-replicas (close to users) and primary write instance? Obv accepting stale reads. I believe we could use aws aurora write forwarding but wondering if we can configure this at the spicedb level. Follow up: is it even a good idea to run spice this way with read replica lag?