More expressive migrations, dashboard improvements

- Your coding agent can now use more built-in Reshape migration actions to validate data with CHECK constraints, optimize queries with partial and expression indexes, and control what happens to related rows when records are updated or deleted.
- We redesigned the dashboard’s deployment detail page with separate Build and Deploy stages, clearer per-service progress, and more prominent failures and app links.
- We streamlined Secrets & Config with inline editing, clearly marked unsaved changes, and a Save & redeploy action. You can review several edits before applying them.









