[sa-salami]

Summary

• Add a TypeScript-AST route coverage check that combines mounted router paths with handler methods and compares them with server/openapi.json.
• Include the check in server CI and document the route/spec update requirement.
• Add coverage operations for registered paths that were missing from the generated OpenAPI file, then regenerate it from server/src/openapi.ts.
• Declare ts-node directly in the server package so its existing OpenAPI scripts work in a clean install.

Fixes #483

Validation

• pnpm check:openapi passed.
• pnpm check:route-spec passed: 87 registered operations covered.
• Frontend Navbar tests for issue [Frontend] - Add Keyboard Navigation Support for Navbar Menu #456 passed separately.
• Server lint and the full server suite still report unrelated notification-template, migration, request-ID, and trade-tracing errors; results are included in the PR checks.

[zeemscript]

@arflexx I checked this failure against the default-branch CI run 40304749221 (Oct 26): server TypeScript and frontend type-check failures are already present on main and do not come from this PR’s OpenAPI drift checker. The PR is currently reported mergeable; its new route-drift workflow may run separately, but the shared TypeScript failures need to be repaired on the base branch before these checks can pass.