Explore ONNX for improving inference performance

[geek-yang]

We can try to convert the random forest model to .onnx model (using skl2onnx) and run it with onnx runner to boost the inference efficiency.

[SarahAlidoost]

https://onnx.ai/

[SarahAlidoost]

see this notebook on how to convert a sklearn model to onnx format.