I OpenAPI spesifikasjonen har Readstatus enum integers som navn.

### Description of the bug

I OpenAPI spesifikasjonen har `ReadStatus` enum integers som navn, i Storage har tilsvarende enum verdiene [ Unread, Read, UpdatedSinceLastReview ]

Se [docs.altinn.studio/swagger/altinn-app-v1.json#/components/schemas/InstanceStatus](https://docs.altinn.studio/swagger/altinn-app-v1.json#/components/schemas/InstanceStatus)

### Steps To Reproduce

1. Åpne swagger for et skjema
2. Gå til InstanceStatus

### Additional Information

_No response_

Start with the OpenAPI schema at the linked InstanceStatus definition and trace how the ReadStatus enum is generated from the C# model and its storage counterpart. Compare the published enum names with Unread, Read, and UpdatedSinceLastReview; the work is done when the generated specification exposes those names instead of integer names.

Written by the indexing model from the issue text.