Media cannot be removed via context menu in metadata editor

[solth]

Describe the bug Deleting media via the context menu option of the structure tree and gallery of the metadata editor does not remove the media anymore.

To Reproduce Steps to reproduce the behavior:

1. Open a process with media in the metadata editor
2. Open the context menu for a node in the structure tree representing a media element (e.g. a page or track)
3. Click the option "Delete media" in the context menu
4. See that media is not removed

Expected behavior Deleting media via the context menu of the structure tree of gallery in the metadata editor should work

Screenshots https://github.com/user-attachments/assets/52c4109f-b0fc-4133-98b1-988457477c3d

Release 3.9.0.RC1, current main branch

Additional context ~~Deleting media via the context menu does work in Kitodo 3.8.x and presumably has been broken by the integration of hibernate-search.~~