refactor: use stream reader for CSV.

[youngsofun]

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Summary

Tests

• [ ] Unit Test
• [ ] Logic Test
• [ ] Benchmark Test
• [x] No Test - Explain why

Type of change

• [ ] Bug Fix (non-breaking change which fixes an issue)
• [ ] New Feature (non-breaking change which adds functionality)
• [ ] Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• [ ] Documentation Update
• [ ] Refactoring
• [x] Performance Improvement
• [ ] Other (please describe):

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This change is 

[github-actions[bot]]

At least one type of change must be checked in the PR description. @youngsofun please update it 🙏.

[github-actions[bot]]

Docker Image for PR

• tag: pr-18895-f78c66d-1761624684

note: this image tag is only available for internal use.