Improve documentation on how to fix "RuntimeError: Both structured output format and JSON mode failed"

I tried to run the two following commands on a 48GB-GPU machine:

uv run src/text_classification/main.py  model_type=llm llm.model_name="meta-llama/Llama-3.1-8B-Instruct"
uv run src/text_classification/main.py  model_type=llm llm.model_name="Qwen/Qwen2.5-7B-Instruct"

Both failed with the following error:

RuntimeError: Both structured output format and JSON mode failed. Please choose a model that supports response_format argument. Original error: litellm.APIError: APIError: OpenAIException - Connection error.

The code documentation should be improved so that users know how to fix this error, i.e. how users can know which models fulfill these criteria.