Update GraphQL model
Follow the steps in the tool-agnostic workflow doc. Do not duplicate the full workflow here.
- •Read and follow: docs/workflows/UPDATE_GRAPHQL_MODEL.md
- •Conventions and do-not-edit list: docs/ARCHITECTURE.md
Execute the steps in order (amplify pull -> edit schema -> amplify push -> verify codegen and build before any UX code -> then update frontend -> test -> commit). Do not implement or change UX until codegen is complete and npm run build passes. Respect caveats (e.g. avoid test data the frontend does not yet support).