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[Tracking] feat(nodes): add hybrid search node with BM25 keyword and vector similarity fusion #619

@stepmikhaylov

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@stepmikhaylov

PR #602 proposes a hybrid search node combining BM25 keyword search with vector similarity via alpha-weighted Reciprocal Rank Fusion, offering pre-configured search profiles and structured output with source attribution.

After review, this PR is not ready for merge in its current state and is being closed to keep the PR list clean. The concept and proposed changes have been archived here for further elaboration and future consideration.

See the PR for full implementation details, test coverage, and extension points.

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good-conceptSolid concept worth pursuinghackathonHackathon project or submissionneeds-refinementRequires further refinement before merging

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