Automatic generation of the schema for server.json

Right now we manually maintain the Go structs that describe the server.json format alongside its schema. This isn’t ideal, since it’s easy for the two to drift out of sync.

A better approach would be to lean on tools that let us define everything at the Go struct level and then auto-generate the schema from there. That way, we reduce errors and keep things consistent with less effort. Let’s take advantage of that.

Start by locating the Go structs that describe the server.json format and the manually maintained schema. Compare their current generation and validation paths, then define a workflow where the schema is generated from the structs and verify that the resulting server.json schema remains consistent without manual duplication.