Add comprehensive hybrid retrieval (BM25 + Vector) evaluation system for RAG pipeline optimization#2

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copilot/fix-6b45db07-6082-46f0-a0e1-e1ff6b87c69ejaganraajan/rag-document-parser:copilot/fix-6b45db07-6082-46f0-a0e1-e1ff6b87c69eCopy head branch name to clipboard