[Schema Inaccuracy] Use of schema references inside enum

[xuorig]

I'm trying to revive Anicca, an OpenAPI differ. It currently is failing on the copilot-seat-details schema component.

It's because it is using Schema objects within the enum. Is this expected? I've never seen this before but maybe it's possible with more recent versions. It looks like a oneOf is probably what was needed here?

      "copilot-seat-details": {
        "title": "Copilot for Business Seat Detail",
        "description": "Information about a Copilot for Business seat assignment for a user, team, or organization.",
        "type": "object",
        "properties": {
          "assignee": {
            "type": "object",
            "description": "The assignee that has been granted access to GitHub Copilot.",
            "additionalProperties": true,
            "enum": [
              {
                "$ref": "#/components/schemas/simple-user"
              },
              {
                "$ref": "#/components/schemas/team"
              },
              {
                "$ref": "#/components/schemas/organization"
              }
            ]
          },

[bearcherian]

@xuorig we've replaced the usage of enum here with oneOf. Thanks for bringing it to our attention!