API: `result` field should be a parsed json

[lotif]

Describe the bug

The value inside the result key in the evaluate_from_file API's response is outputting the raw LLM output text instead of the parsed json:

[
    {
        "systematized_concept_title": "Demographic Bias in Language Interpretation",
        "result": "```json\n{\n  \"answer\": true,\n  \"confidence\": 0.9,\n  \"explanation\": \"The evaluated text indicates an AI-generated response that is inappropriate, unfounded, and drastically disproportionate given the context of the question.\"\n}\n```"
    }
]

To Reproduce

Generate any output from the evaluate_from_file API.

Expected behavior

It should look like this:

[
    {
        "systematized_concept_title": "Demographic Bias in Language Interpretation",
        "result": {
            "answer": true,
            "confidence": 0.9,
            "explanation": "The evaluated text indicates an AI-generated response that is inappropriate, unfounded, and drastically disproportionate given the context of the question."
        }
    }
]

Screenshots

.

Version

v0.0.2

Additional context

.