[improvement] set streamLoad prop num_as_string default true to avoid…

[lxwcodemonkey]

… loss of floating point precision

Proposed changes

Issue Number: close #xxx

Problem Summary:

Describe the overview of changes.

Checklist(Required)

1. Does it affect the original behavior: (Yes/No/I Don't know)
2. Has unit tests been added: (Yes/No/No Need)
3. Has document been added or modified: (Yes/No/No Need)
4. Does it need to update dependencies: (Yes/No)
5. Are there any changes that cannot be rolled back: (Yes/No)

Further comments

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[lxwcodemonkey]

@JNSimba Could you help me to have a look? thanks!

[JNSimba]

Thank you for your contribution. Is it better to modify the default value directly on the streamload side?