polars struct-json-encode для DataFrame

> [[id person]; [1 {name: "Bob", age: 36}] [2 {name: "Betty", age: 63}]]
                    | polars into-df -s {id: i32, person: {name: str, age: u8}}
                    | polars select id (polars col person | polars struct-json-encode | polars as encoded)
                    | polars sort-by id
                    | polars collect
╭───┬────┬───────────────────────────╮
│ # │ id │          encoded          │
├───┼────┼───────────────────────────┤
│ 0 │  1 │ {"name":"Bob","age":36}   │
│ 1 │  2 │ {"name":"Betty","age":63} │
╰───┴────┴───────────────────────────╯