`CatalogEntity` includes storage specific logic

### Describe the bug

`CatalogEntity` should be a "pure" representation of a catalog, but includes storage specific logic. The same might be true for other entity types.

### To Reproduce

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### Actual Behavior

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### Expected Behavior

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### Additional context

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### System information

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Start by locating CatalogEntity in the Java sources and reviewing its storage-specific logic. Check whether other entity types have the same coupling. The issue names no tests or acceptance criteria, so the separation boundary and definition of done need maintainer clarification.

Written by the indexing model from the issue text.