fix(issue): DallEAPIWrapper passes unsupported 'quality' param to OpenAI API

[Gurram Siddarth Reddy (siddarthreddygsr)]

This PR fixes #177 , quality parameter will now only be sent if specifically mentioned.

[Gurram Siddarth Reddy (siddarthreddygsr)]

Mason Daugherty (@mdrxy) Can you please review this and suggest any changes if required

[Copilot]

Pull Request Overview

This PR fixes issue #177 by modifying the DALL-E image generator to only include the quality parameter in API calls when it's explicitly set by the user, rather than always sending a default "standard" value.

• Changed the default quality parameter from "standard" to None
• Updated the API call logic to conditionally include the quality parameter only when it has a value

Comments suppressed due to low confidence (2)

libs/community/langchain_community/utilities/dalle_image_generator.py:144

• [nitpick] The variable name 'kwargs' is generic and doesn't clearly describe its purpose. Consider renaming it to 'api_params' or 'generation_params' to better indicate it contains parameters for the image generation API call.

            kwargs = {

libs/community/langchain_community/utilities/dalle_image_generator.py:152

• The new conditional logic for including the quality parameter should be covered by unit tests. Tests should verify that: 1) when quality is None, the parameter is not sent to the API, and 2) when quality has a value, it is properly included in the API call.

            response = self.client.generate(**kwargs)