Implement the File Sanitization in a Separate Service to Make it More Reusable

Problem/Motivation

The current file sanitization approach is implemented directly in the event subscriber, which makes it difficult to reuse.

Proposed resolution

I suggest moving the file name sanitization to a separate service, which will make it more usable for other modules.

Remaining tasks

User interface changes

Introduced terminology

API changes

Data model changes

Release notes snippet