<!-- GENERATED from convex-agents content/capabilities/migrate.json — do not edit by hand. -- Migrate the schema / data on a live app Change a deployed schema without breaking existing data: stage the schema change, install @convex-dev/migrations, write a backfill that makes old rows valid, run it, and verify before tightening the validator. Workflow 1. Make the new field optional first (so deploy doesn't reject existing rows). 2. Install @convex-dev/migrations; write a migration that backfills/transforms existing rows. 3. Run the migration; verify all rows are valid. 4. Tighten the validator…