Changelog + Docs: Import CSV rows into indexed collections with per-row metadata (OCS #4601)

[ocs-agent]

Summary

Automated changelog and documentation updates based on merged PR in open-chat-studio.

Source PR: dimagi/open-chat-studio#4601
PR Title: Import CSV rows into indexed collections with per-row metadata
Author: @barry47products
Base Branch: main
Widget Change: ❌ No

Changes Made

• Changelog (Main changelog (docs/changelog.md)): ✅ Updated
• Documentation: ✅ Updated

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🤖 This PR was automatically generated using Claude to analyze the source PR and update the changelog and documentation accordingly.

[lisa-tarbo]

Be aware that I am also improving Collection docs so there may be conflicts with #868
I am also working on Document Sources user docs regarding snapshots and the new JSON collection

[barry47products]

Be aware that I am also improving Collection docs so there may be conflicts with #868 I am also working on Document Sources user docs regarding snapshots and the new JSON collection

Thanks @lisa-tarbo. This one needs corrections anyway, so I'm happy to wait for #868 to merge and then move the CSV section into your new indexed_collections/ layout. Does that work for you?

One thing for #868: local_and_remote_indexes.md lists "pdf, txt, csv, docx" for local indexes, but regular upload to an indexed collection doesn't accept csv. Both index types use the same file_search list in settings.

[lisa-tarbo]

@barry47products Works for me. Thanks for highlighting issue with my PR so will fix this!

Could you do a review of all of the PR content and check accuracy and value ? I am not an experienced user of this feature and this would help Simon with his long list of PRs