List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=subsequent_pairing_method&page=22
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "ended": "2026-02-28T00:11:29.056205Z",
            "start_waiting": "2025-11-27T04:00:09.964808Z",
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}