Upgrade fern python generator #758
Merged
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Brings in change from fern-api/fern#10038
This fixes an issue where e.g.
tool-callsandend-of-call-reportpayloads get deserialized intoServerMessageAssistantRequest, the first union member even when the discriminant is properly applied. This was happening due to the payloads being (only slightly) invalid, and the union deserialization logic going through Pydantic validation.