The DO migration (new_tag=v1) may only be applied once. The old
durable-object-namespace detection wrongly reported 'migration needed'
even though the namespace already existed at tag v1, so Terraform
re-sent the v1 migration on an already-migrated worker and Cloudflare
rejected the apply with 412 / code 10079. Gate migration on
worker-script existence instead.
Co-authored-by: Test User <test@example.com>
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>