metadata setter of ResponseCreateParams.builder()accepts Metadata object, which, in turn may contain ```
numeric fields:

 val metadata = Metadata.builder() .putAdditionalProperty("someNumericId", JsonNumber.of(123)) .build(); 

Response with such metadata instance fails though:

ResponseCreateParams.builder().metadata(metadata).build().... 

showing error:

com.openai.errors.BadRequestException: 400: OpenAIError{additionalProperties={error={message=Invalid type for 'metadata.someNumericId': expected a string, but got an integer instead., type=invalid_request_error, param=metadata.someNumericId, code=invalid_type}}}

String as a value works fine though.