Disabling Git auto-deploy is correct for Actions-gated production. The
separate project toggle "Auto-assign Custom Production Domains" must stay
ON — when OFF, `vercel deploy --prod` only aliases *.vercel.app and leaves
the custom domain on an older Current (exactly what we saw after #122).
After each deploy, ensure-production-alias re-enables auto-assign if needed,
promotes the deployment, and verifies pt.jorgesolla.com.br is attached.
Also adds workflow_dispatch "Vercel promote production" for promote-without-rebuild.
baa8f14f82