feat: add support for multi filter retriever

[srini047]

Related Issues

• fixes Add a MultiFilterRetriever #10995

Proposed Changes:

Add support for MultiFilterRetriever, a new retriever component that executes multiple filter queries against a document store in parallel and returns a single, de-duplicated list of documents sorted by relevance score.

How did you test it?

Added unit tests around the new filter and ensured older doesn't break.

Notes for the reviewer

Checklist

• I have read the contributors guidelines and the code of conduct.
• I have updated the related issue with new insights and changes.
• I have added unit tests and updated the docstrings.
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test: and added ! in case the PR includes breaking changes.
• I have documented my code.
• I have added a release note file, following the contributors guidelines.
• I have run pre-commit hooks and fixed any issue.

[vercel]

@srini047 is attempting to deploy a commit to the deepset Team on Vercel.

A member of the Team first needs to authorize it.

[bogdankostic]

Hi @srini047, thank you very much for the PR! I left a few comments on how we can simplify the MultiFilterRetriever.

[bogdankostic]

Thanks for addressing the requested changes @srini047!

Looking at the current implementation, since FilterRetriever is the only retriever that can be used with MultiFilterRetriever, I think we should simplify the API by accepting a document_store parameter directly instead of retriever. This way, MultiFilterRetriever can create the FilterRetriever internally and users get a simpler interface.

[srini047]

Thanks for addressing the requested changes @srini047!

Looking at the current implementation, since FilterRetriever is the only retriever that can be used with MultiFilterRetriever, I think we should simplify the API by accepting a document_store parameter directly instead of retriever. This way, MultiFilterRetriever can create the FilterRetriever internally and users get a simpler interface.

@bogdankostic If we look at the issue that was the ask to take filters as input: MultiFilterRetriever so a version of the FilterRetriever that can handle a list of filters as input.

WDYT?