docstrings_on_attributes: true removes examples

Describe the bug
If I add docstrings_on_attributes: true to my config, then example fields in my openapi schemaare removed entirely from the docstrings.

The default behavior seems to be to list first the description and then the example field in the attribute docstring at the top of the class. I'd expect that behavior to be retained when I add docstrings_on_attributes: true

OpenAPI Spec File
A link to an OpenAPI document which produces this issue. Ideally, write a minimal reproduction only containing the problematic pieces.

Desktop (please complete the following information):

• OS: [e.g. macOS 10.15.1] macOS 15.5
• Python Version: [e.g. 3.8.0] 3.11.9
• openapi-python-client version [e.g. 0.1.0] 0.25.1

Additional context
Add any other context about the problem here.

El issue menciona openapi-python-client 0.25.1 y la configuración docstrings_on_attributes, pero no especifica ningún archivo fuente ni prueba. Empieza reproduciendo los docstrings generados con y sin esa opción mediante un documento OpenAPI mínimo. Se considera completado cuando los docstrings de los atributos conservan tanto los campos description como example con la opción habilitada.