Create requirements.txt

requirements.txt

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+# Core
+gradio
+numpy
+pandas
+scikit-learn
+joblib
+
+# RAG / retrieval
+sentence-transformers
+rank-bm25
+PyMuPDF
+pypdf
+
+# OpenAI LLM (for optional LLM synthesis)
+openai
+
+# Evaluation metrics (lexical + semantic)
+nltk
+rouge-score
+bert-score