原始proto数据转JSON 
{
  "persons": [
    {
      "name": "John Doe",
      "boolValue": true,
      "email": "john@example.com",
      "contact": {
        "phone": "111-222-333",
        "isActive": true,
        "scores": [
          98,
          95,
          92
        ]
      },
      "ids": [
        "1001",
        "1002",
        "1003"
      ]
    },
    {
      "name": "Jane Doe",
      "in...