ycb_django_pr15987

what a new run launched now would send

Fixture dirs duplicates undetected if dir is Path instance
Description
	
When FIXTURE_DIRS contains Path instances, the duplicate check in loaddata does not detect duplicates.

Work only inside this repository checkout. Make the code change the task
describes, keeping the diff focused — no drive-by refactors.

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they are collected automatically.

Stay on this snapshot checkout (`task/ycb_django_pr15987`). Never checkout, pull, or rebase onto `main`. That branch is a README-only orphan.
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Some past runs of this task were launched with a different prompt (the prompt template changed since, or those runs predate this benchmark's stored prompt). Each run persists the exact prompt it sent at launch — that per-launch record is the audit trail; this page shows only the current one.