Can't retrieve original files after the "Media cache retention period" when using Object Storage Proxy

[manuviens]

Steps to reproduce the problem

1. Use the Object Storage Proxy config
2. At https://mastodon.tld/admin/settings/content_retention, set Media cache retention period to something like 180 and leave Content cache retention period empty
3. Look at old posts, their media files had been purged from the S3 bucket, so they could no longer be retrieved with the actual Object Storage Proxy config for nginx

Expected behaviour

Retrieve the original files from the origin instances and copy them back into bucket S3

Actual behaviour

Old posts have missing media files (Error 429)

Detailed description

I'm using nginx in front of my S3 bucket to serve media files using this example :
https://docs.joinmastodon.org/admin/optional/object-storage-proxy/

This is my retention settings :

Mastodon instance

pouet.fedi.quebec

Mastodon version

v4.2.8

Browser name and version

Firefox 125.0.2

Operating system

LinuxMint 21.3 & Cinnamon

Technical details

Related to S3 in my .env.production :

S3_ENABLED=true
S3_PROTOCOL=https
S3_REGION=bhs
S3_ENDPOINT=https://s3.bhs.perf.cloud.ovh.net
S3_HOSTNAME=s3.bhs.perf.cloud.ovh.net
S3_ALIAS_HOST=medias.pouet.fedi.quebec
S3_BUCKET=my_bucket_name
AWS_ACCESS_KEY_ID=my_acces_key
AWS_SECRET_ACCESS_KEY=my_secret_key
S3_FORCE_SINGLE_REQUEST=true