In latest Dassie (Ruby 3.3, Rails 7.2), most thumbnail images are not available

[nhomenda]

Descriptive summary

In latest Dassie (Ruby 3.3, Rails 7.2), most thumbnail images are not available

Steps to reproduce the behavior in User Interface (UI)

In Dassie (https://dev.nurax.samvera.org/), show all works
No thumbnails for newly-created and most previously-created works in catalog, work view page, file details, dashboard, etc.
https://dev.nurax.samvera.org/concern/images/ww72bb76t?locale=en has working thumbnails, though, among other works/filesets created/updates on or prior to 2023-06-20

Acceptance Criteria/Expected Behavior

Thumbnails are generated for appropriate file types and are visible in expected locations.

[nhomenda]

After @dlpierce made updates on 2/6/25, this works intermittently. Some file sets get thumbnails, others do not.