[WIP] fix: get_producer type add & test

[psy2848048]

Background

• Ask an opinion for breaking but occuring data loss Float64 data

Summary

When parsing total_producer_vote_weight, the float64 value shows as 4.403240198383598e+20
So, there is a data loss in parsing.

- (string) (len=26) "total_producer_vote_weight": (string) (len=28) "440324019838359830528.000000"
+ (string) (len=26) "total_producer_vote_weight": (string) (len=21) "440324019838359800000"

But I think this loss is not really important in the lower digit part loss. What do you think?
If yes, I'll change the expected data to pass the test.

Note

Checklist

• Backward compatible?
• Test enough in your local environment?
• Add related test cases?

[maoueh]

@psy2848048 I'm not sure I understand your comment. I saw the diff, only thing I see that changes outside of tests is the change from JSONTime to BlockTimestamp. I don't see how it relates to your comment. So I'm unsure here.