Get available guardrail types for agent

{
    "success": true,
    "message": "Guardrail types retrieved successfully",
    "data": {
        "guardrail_types": [
            {
                "type": "topic_control",
                "name": "Topic Control",
                "description": "Controls what topics the agent can discuss",
                "enabled": true,
                "guardrail": {
                    "id": 1,
                    "name": "Content Boundaries",
                    "description": "Restricts discussions to safe topics",
                    "created_on": "2024-03-15T10:30:00Z",
                    "modified_on": "2024-03-16T09:15:00Z",
                    "created_by": "admin@example.com",
                    "modified_by": "admin@example.com",
                    "organization_id": 1,
                    "guardrail_type": "topic_control",
                    "is_enabled": true,
                    "is_default": false,
                    "is_deleted": false,
                    "guidelines": [
                        "No discussions about illegal activities",
                        "No harmful content"
                    ]
                }
            },
            {
                "type": "ethical_moderation",
                "name": "Ethical Moderation",
                "description": "Ensures responses are ethically sound",
                "enabled": false
            }
        ]
    }
}