Originally inspired by: https://gist.github.com/notflip/e33c0b45299674ce56d80f1c6d08bd09
Re-upload media files through the Payload REST API so Payload re-processes each file (image sizes, hooks, and related upload pipeline behavior).
This script:
- Authenticates as a Payload admin user
- Iterates upload documents in one or more collections
- Downloads each original file from S3