[Load balancer] Sticky reads

[levkk]

Stick to the primary for a read from a table that just received a write from the same connection. This can help with the following:

user = User.create email: "test@test.com"
user.reload

[ats1999]

Curious about how it can be achieved? Read your own write consistency is scoped to user session, pgdog will have no idea about user.