[BUG] playground prompt saves the wrong response format when validation fails without informing user

[RogerHYang]

When a python dict is entered (e.g. copied from openai website), the False value (which is capitalized) fails JSON validation (it should be lower case instead), but behind the scene a different response format (the default version) is saved to database without user's knowledge.

{
    "type": "json_schema",
    "json_schema": {
        "name": "math_response",
        "strict": True,
        "schema": {
            "type": "object",
            "properties": {
                "steps": {
                    "type": "array",
                    "items": {
                        "type": "object",
                        "properties": {
                            "explanation": {"type": "string"},
                            "output": {"type": "string"},
                        },
                        "required": ["explanation", "output"],
                        "additionalProperties": False,
                    },
                },
                "final_answer": {"type": "string"},
            },
            "required": ["steps", "final_answer"],
            "additionalProperties": False,
        },
    },
}

[cephalization]

This input, and some others, like Tool definition, store the last successfully validated instance of its value when you have an error.

This means that if there are any validation errors on these fields, only the last valid value will be accessible.

So saving as prompt, or running chat completion, will use a "stale" value.

We should not do this, just let the playground fail or the prompt save fail with invalid data instead.