Use DO blocks with EXCEPTION WHEN duplicate_column to safely handle
columns that may already exist from a previous db push.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Create migration 20260426130000_add_agent_schedule_fields with the 3 new
Agent columns (scheduledTime, scheduledDay, timezone). Reverts entrypoint
back to prisma migrate deploy. Removes redundant migration step from
deploy.yaml.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>