Tournament support for ATP/WTA/ATP Challenger.

New ATP/WTA/ATP Challenger fixtures will now have a tournament and a tournament stage populated.

{
  "data": [
    {
      "id": "202605050C4F220C",
      "numerical_id": 851849,
      "sport": {
        "id": "tennis",
        "name": "Tennis",
        "numerical_id": 25
      },
      "league": {
        "id": "atp",
        "name": "ATP",
        "numerical_id": 20
      },
      "tournament": {
        "id": "993CAF204CD42D50",
        "name": "Rome, Italy",
        "numerical_id": 16186,
        "start_date": "2026-05-04T00:00:00Z",
        "end_date": "2026-05-17T00:00:00Z"
      },
      "tournament_stage": "Qualification",