ElDa7ee7 QA

End-to-end Arabic QA over ElDa7ee7 Season 8: dialect-aware cleaning of 3,900 extractive pairs, RNN vs Transformer models trained from scratch in TensorFlow, then a ChromaDB RAG chatbot with Streamlit. Groq Llama 3.3 with Gemini fallback; optional MS2 rerank and hybrid answers. Handles MSA/Egyptian mix, code-switching, and noisy punctuation.