Our QA and Production environments live in separate VPCs. We'll have SpiceDB dedicated so that will run our production environment. We require logical isolation between QA and Production so re-using the same database is not an option. Ideally we would also like physical separation, in part because we don't want to connect the QA and Prod VPCs. What are our options here? Is it a case of "either buy a second SpiceDB dedicated or run the QA environment in the SaaS solution"?