GET /collections/:coluuid directory search is not working as intended

[pythonicode]

Describe the bug
After uploading multiple files to a collection with a path starting with / not all of them show up in the directory /.

To Reproduce
Upload two files with the paths /0c54b536be3573bc.p(1).woff2/0c54b536be3573bc.p(1).woff2 and /prep.txt/prep.txt.
Call GET /collection/:coluuid to see the two entries.
Call GET /collection/:coluuid?dir=/ and you will see only 1 entry.

Expected behavior
The root directory/ should have all files with path's starting with / and not be missing any.

Actual behavior
The root directory / is missing paths starting with /.

Additional context
Discussion on Slack: https://filecoinproject.slack.com/archives/C016APFREQK/p1677178196959089

[pythonicode]

Should be addressed by #934