Validate routes in CI

Add deterministic commands

{
  "scripts": {
    "routes:validate": "cbr validate",
    "routes:generate": "cbr generate",
    "ci:routes": "pnpm routes:validate && pnpm routes:generate && git diff --exit-code -- .cookbook-router"
  }
}

validate checks the route input without treating generated output as proof. generate then verifies static extraction and output safety. The diff check catches stale committed artifacts when your project chooses to commit them.

Validate the same config as builds

Do not give CI a simplified route list. Use the same config file, path constraints, route globs, and output directory as local builds. A green toy tree says nothing about the application tree.

Where this bites

A TypeScript compile can pass against stale generated declarations while runtime routes changed. API types are not an integrity checksum. Generation belongs before typecheck/build or in the bundler plugin lifecycle.