curl --request POST \
  --url https://api.galileo.ai/v2/projects/{project_id}/sessions/available_columns \
  --header 'Content-Type: application/json' \
  --header 'Galileo-API-Key: <api-key>' \
  --data '
{
  "log_stream_id": "<string>",
  "experiment_id": "<string>",
  "metrics_testing_id": "<string>",
  "start_time": "2023-11-07T05:31:56Z",
  "end_time": "2023-11-07T05:31:56Z"
}
'

{
  "columns": [
    {
      "id": "<string>",
      "label": "<string>",
      "description": "<string>",
      "group_label": "<string>",
      "multi_valued": false,
      "allowed_values": [
        "<unknown>"
      ],
      "sortable": true,
      "filterable": true,
      "is_empty": false,
      "applicable_types": [],
      "is_optional": false,
      "roll_up_method": "<string>",
      "metric_key_alias": "<string>",
      "scorer_config": {
        "id": "<string>",
        "model_name": "<string>",
        "num_judges": 123,
        "filters": [
          {
            "value": "<string>",
            "name": "node_name",
            "case_sensitive": true
          }
        ],
        "scoreable_node_types": [
          "<string>"
        ],
        "cot_enabled": true,
        "name": "<string>",
        "scorer_version": {
          "id": "<string>",
          "version": 123,
          "scorer_id": "<string>",
          "generated_scorer": {
            "id": "<string>",
            "name": "<string>",
            "chain_poll_template": {
              "template": "<string>",
              "metric_system_prompt": "<string>",
              "metric_description": "<string>",
              "value_field_name": "rating",
              "explanation_field_name": "explanation",
              "metric_few_shot_examples": [
                {
                  "generation_prompt_and_response": "<string>",
                  "evaluating_response": "<string>"
                }
              ],
              "response_schema": {}
            },
            "instructions": "<string>",
            "user_prompt": "<string>"
          },
          "registered_scorer": {
            "id": "<string>",
            "name": "<string>",
            "score_type": "<string>"
          },
          "finetuned_scorer": {
            "id": "<string>",
            "name": "<string>",
            "lora_task_id": 123,
            "prompt": "<string>",
            "lora_weights_path": "<string>",
            "class_name_to_vocab_ix": {}
          },
          "model_name": "<string>",
          "num_judges": 123,
          "scoreable_node_types": [
            "<string>"
          ],
          "cot_enabled": true
        },
        "multimodal_capabilities": [],
        "score_type": "<string>"
      },
      "scorer_id": "<string>",
      "threshold": {
        "inverted": false,
        "buckets": [
          123
        ],
        "display_value_levels": [
          "<string>"
        ]
      }
    }
  ]
}