Liu An
f8524462b0
Fix: Increase default `chunk_token_num` from 128 to 512 in parser config (#8753)
### What problem does this PR solve?
Updated the default `chunk_token_num` value in `api_utils.py` and
`validation_utils.py` to 512 to accommodate larger text chunks. Adjusted
corresponding test cases in HTTP and SDK API tests to reflect this
change.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)