migrate cloudinary profile images to supabase (Storage with Image Transformations)

[4www]

In order to remove external dependencies, it could be nice to migrate the channel profile images to supabase. That way we can drop Cloudinary, and have all image uploads, and transforms, live in Supabase.

• https://supabase.com/docs/guides/storage/serving/image-transformations
• https://supabase.com/docs/guides/storage/serving/bandwidth
• https://supabase.com/docs/guides/storage/serving/downloads

For this, we should (script/update-code-base):

1. go through all channels with profile image
2. upload the full size image to supabase storage
3. set the channel image to the new supabase image
4. update the frontend client to use transformed images, and upload new images to/from supabase

[oskarrough]

Cool! And ideally we do https://github.com/radio4000/migration-2026 before this.