Staging deployments

In convex@1.36.0 you can do npx convex deployment create staging --type prod to create a Staging deployment with independent configuration. Using its deploy key, you can set up your CI to deploy to it. While there isn't a "promote this to production" button, you can deploy the same code to production when you're confident in it. The underlying data is separate, and there is not a short-term plan to mirror or fork prod data into other deployments, though you can use seed scripts or sample production data from backups to periodically create "representative" datasets in Staging