`Input should be a valid string` for integer keys in openapi.yaml

Describe the bug
When generating classes from openapi.yaml with integers as keys (e.g. 200), I get the error:

paths./api/events.get.responses.200.[key]
  Input should be a valid string [type=string_type, input_value=200, input_type=int]
    For further information visit https://errors.pydantic.dev/2.12/v/string_type

Is there a chance to ignore those errors and fall back to string for integer keys?

OpenAPI Spec File
Link to an OpenAPI document

Desktop (please complete the following information):

• OS: macOS 26.0.1
• Python Version: 13.3
• openapi-python-client version: 0.26.2

首先使用关联的 openapi.yaml 和 openapi-python-client 0.26.2 重现该故障，重点关注 paths./api/events.get.responses.200 中的 response key。当 integer keys 在类生成期间被接受并作为 strings 处理，而不是产生 Pydantic validation error 时，工作即完成。