caravel/backend/spec/main.md

async fn main() -> Result<()>

• Configures logging
• Calls create_pool to get a SqlitePool, then creates Query, Command, Robot, Billing, Api, and Infra
• Get an axum router from api.router
• Adds CORS middleware based on origins
• Calls axum::serve with a listener
• Spawns infra.start
• Spawns billing.start