Creates an incident form field selection

curl --request POST \
  --url https://api.rootly.com/v1/incidents/{incident_id}/form_field_selections \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '
{
  "data": {
    "type": "incident_form_field_selections",
    "attributes": {
      "incident_id": "<string>",
      "form_field_id": "<string>",
      "value": "<string>",
      "selected_catalog_entity_ids": [
        "<string>"
      ],
      "selected_group_ids": [
        "<string>"
      ],
      "selected_option_ids": [
        "<string>"
      ],
      "selected_service_ids": [
        "<string>"
      ],
      "selected_functionality_ids": [
        "<string>"
      ],
      "selected_user_ids": [
        123
      ]
    }
  }
}
'

{
  "data": {
    "id": "efe26337-8d08-40f7-8841-234404fd3027",
    "type": "incident_form_field_selections",
    "attributes": {
      "incident_id": "891724e5-9e19-40ff-82f0-ff1c15a893a4",
      "custom_field_id": 177,
      "form_field_id": "68e4c749-06d2-4780-a7e3-b8524392a77e",
      "form_field": {
        "id": "68e4c749-06d2-4780-a7e3-b8524392a77e",
        "team_id": 284,
        "slug": "sed-ut-iusto-provident",
        "kind": "custom",
        "input_kind": "text",
        "value_kind": "inherit",
        "value_kind_catalog_id": null,
        "name": "Sed ut iusto provident.",
        "description": "Veniam saepe incidunt voluptas.",
        "shown": [
          "web_new_incident_form",
          "web_update_incident_form"
        ],
        "required": [],
        "default_values": [],
        "show_on_incident_details": true,
        "enabled": true,
        "updated_at": "2025-12-24T09:25:51.610-08:00",
        "created_at": "2025-12-24T09:25:51.610-08:00",
        "options": [
          {
            "id": "ba3390af-9461-4cb2-877e-cdd7f06426af",
            "form_field_id": "68e4c749-06d2-4780-a7e3-b8524392a77e",
            "value": "Molestiae similique doloribus voluptatem.",
            "color": "#FBE4A0",
            "default": false,
            "position": 1,
            "updated_at": "2025-12-24T09:25:51.629-08:00",
            "created_at": "2025-12-24T09:25:51.629-08:00"
          },
          {
            "id": "58d5960e-34bd-40aa-bdaf-790fdd2026a0",
            "form_field_id": "68e4c749-06d2-4780-a7e3-b8524392a77e",
            "value": "Ratione modi veniam et.",
            "color": "#FBE4A0",
            "default": false,
            "position": 2,
            "updated_at": "2025-12-24T09:25:51.632-08:00",
            "created_at": "2025-12-24T09:25:51.632-08:00"
          }
        ],
        "positions": [
          {
            "id": "e4cea4cd-cbda-4cc4-995c-02b69af2a25e",
            "form_field_id": "68e4c749-06d2-4780-a7e3-b8524392a77e",
            "form": "web_update_incident_form",
            "position": 2
          },
          {
            "id": "b1c93887-5f98-4f91-bcf6-5b66d1facbb4",
            "form_field_id": "68e4c749-06d2-4780-a7e3-b8524392a77e",
            "form": "web_new_incident_form",
            "position": 2
          }
        ]
      },
      "value": "Test custom field",
      "selected_group_ids": [],
      "selected_groups": {
        "id": null,
        "value": "Test custom field"
      },
      "selected_option_ids": [],
      "selected_options": {
        "id": null,
        "value": "Test custom field"
      },
      "selected_service_ids": [],
      "selected_services": {
        "id": null,
        "value": "Test custom field"
      },
      "selected_functionality_ids": [],
      "selected_functionalities": {
        "id": null,
        "value": "Test custom field"
      },
      "selected_catalog_entity_ids": [],
      "selected_catalog_entities": {
        "id": null,
        "value": "Test custom field"
      },
      "selected_user_ids": [],
      "selected_users": {
        "id": null,
        "value": "Test custom field"
      }
    }
  }
}