After a successful S3 upload, log the HTTPS URL so the workflow run
output shows where the artefact was published. Uses the regional
virtual-hosted form for AWS S3 and path-style for custom endpoints,
matching how NewClient configures the client.
The URL is what the object would be served at if the bucket allows
public reads — the orchestrator does not assert anything about the
bucket's access policy.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>