Get Staking Overview

curl --request GET \
  --url https://api-evm.orderly.org/v1/staking/overview

{
  "success": true,
  "timestamp": 1702989203989,
  "data": {
    "total_stake": 845599630.06,
    "rows": [
      {
        "date": "2023-05-20",
        "usd_reward": 1268.34,
        "total_staked_usd": 117654321.99
      }
    ]
  }
}