Dataset JSON GET API returns numbers as strings

What steps does it take to reproduce the issue?

1. Enable metadata block with fields with fieldType int or float
2. Create dataset
3. Use the JSON GET API to retrieve the dataset https://guides.dataverse.org/en/latest/api/native-api.html#get-json-representation-of-a-dataset e.g. GET /api/datasets/42?exporter=dataverse_json

• What happens?

The values for the numerical fields are returned as strings, e.g. {'typeName': 'my_int_field', 'multiple': False, 'typeClass': 'primitive', 'value': '5'}

• What did you expect to happen?

The numerical fields to be returned as integers/floats, e.g. {'typeName': 'my_int_field', 'multiple': False, 'typeClass': 'primitive', 'value': 5}

Which version of Dataverse are you using?

v5.13

Any related open or closed issues to this bug report?

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Screenshots:

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Start with the dataset JSON GET endpoint documented in the issue and trace the dataverse_json exporter. Reproduce the response using int and float metadata fields, then inspect the serialization path for where values become strings. Done means the GET response returns JSON numbers for both types, with regression coverage for the behavior.