TypeError: Type is not JSON serializable: `numpy.ndarray`/`recarray`

## Problem
We probed JSON serialization with `crate-python` and discovered it does not work well in all situations yet, for example when the data payload includes an array/list, and is read from JSON using pandas or Polars.

```json
{"foo":"bar","baz":["qux"]}
```

The reason is that the decoded payload includes `numpy.ndarray` or `recarray` types.

## Reproduce
[`cratedb-orjson.py`](https://gist.github.com/amotl/f55474d633e7c71498c24ce3ca4c6332) can be used to reproduce the problem.

## References
- https://github.com/crate/cratedb-toolkit/issues/482

Start with the cratedb-orjson.py reproduction linked in the issue and inspect how crate-python handles decoded payloads containing numpy.ndarray or recarray values. Confirm the failure with array/list data read through pandas or Polars; done means those payloads serialize without the reported TypeError.

由索引模型根据 Issue 内容生成。