Removing a few chunk_size/overlap references missed in #1160

[jamesbraza]

I rushed #1160 trying to unblock something

[dosubot]

Documentation Updates

Checked 1 published document(s). No updates required.

^{How did I do? Any feedback?}  

[Copilot]

Pull Request Overview

This PR migrates from deprecated chunk_size and overlap fields in ParsingSettings to their replacements in the reader_config dictionary (chunk_chars and overlap). The changes update three files to use the new dictionary-based configuration instead of the direct field access.

• Updates references from parsing.chunk_size to parsing.reader_config["chunk_chars"]
• Updates references from parsing.overlap to parsing.reader_config["overlap"]
• Refactors chunking logic in openreview_paper_helper.py for better readability

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
tests/test_agents.py	Updates test assertion to use new reader_config["chunk_chars"] instead of deprecated chunk_size
src/paperqa/settings.py	Updates index name generation to use reader_config dictionary values instead of deprecated fields
src/paperqa/contrib/openreview_paper_helper.py	Refactors submission string chunking to extract chunk_size from reader_config and improves code readability

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