Persistence model depends on public management API

[snazy]

Describe the bug

All entities of the persistence model have asXyz() functions to return a type from the management OpenAPI spec. While this is currently convenient, it introduces a cyclic dependency, which should generally be avoided:

• management-API depends on REST endpoints
• REST endpoint implementations depend on entities
• entities depend on management-API

The management API and its implementation should not leak into the persistence model.

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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