An out-of-band empty directory listed under its own trailing-slash
prefix answered the probe with a fake entry of itself: a Contents key on
4.48 and, since recently, a CommonPrefix. That listing enumerates
children, where S3 returns nothing for an empty prefix, and clients that
read every returned key (Pulumi lock listing) choked on the marker.
The prefix object and directory key object paths are unchanged: a real
"dir/" object still lists as its own key.
Generated with [Devin](https://devin.ai)
Co-authored-by: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
