curl --request GET \
  --url https://api.example.com/solana/delivery/{pda}

{
  "pda": "<string>",
  "data": {
    "drone_pda": "<string>",
    "airspace_pda": "<string>",
    "ipfs_cid": "<string>",
    "latitude": 123,
    "longitude": 123,
    "altitude_m": 123,
    "delivered_at": 123
  },
  "tx": {
    "signature": "<string>",
    "slot": 123,
    "confirmation": "<string>",
    "fee_lamports": 123
  }
}