Checkpoint task 3 resolved: BWS secret keys renamed in Bitwarden
(AWS_ACCESS_KEY_ID/AWS_SECRET_ACCESS_KEY confirmed present), DNS egress
to public resolvers confirmed OK, credentials confirmed reaching the
Node process. IAM scope left as an open operational item for the
developer to confirm via AWS console.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>