Create prediction proposal

curl --request POST \
  --url https://api.alpha-labs.trade/api/v1/predictions/proposals \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "groupId": "1a9d212a-de67-45f4-88f5-6e9f41e78dc0",
  "eventId": "KXNFLGAME-25SB",
  "marketId": "KXNFLGAME-25SB-KC",
  "isYes": true,
  "amountUsd": "10.00",
  "reason": "KC value"
}
'

{
  "data": {
    "proposal": {
      "id": "<string>",
      "groupId": "<string>",
      "createdById": "<string>",
      "eventId": "<string>",
      "marketId": "<string>",
      "outcomeMint": "<string>",
      "eventTitle": "<string>",
      "marketTitle": "<string>",
      "eventImageUrl": "<string>",
      "isYes": true,
      "status": "<string>",
      "result": "<string>",
      "didWin": true,
      "reason": "<string>",
      "resolvedAt": "2023-11-07T05:31:56Z",
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z"
    },
    "trade": {
      "id": "<string>",
      "proposalId": "<string>",
      "groupId": "<string>",
      "walletAddress": "<string>",
      "tradeType": "<string>",
      "tokenAmount": "4.27",
      "tokenDecimals": 123,
      "pricePerTokenUsd": "12.50",
      "totalCostUsd": "12.50",
      "pnlPct": "4.27",
      "pnlUsd": "12.50",
      "txSignature": "<string>",
      "createdAt": "2023-11-07T05:31:56Z"
    }
  }
}