Update README.md

README.md

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 The project evolved from RAG v1 → RAG v2, adding real-world scalability and observability.
 
 ✨ Key Features (RAG v2)
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 📥 Document Ingestion
 
 Upload PDF and TXT files
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 Frontend (HTML / JS)
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         ↓
 
 FastAPI Backend
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 Evaluation Logging + Analytics
 
 
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 🧠 Core Concepts Demonstrated
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 Retrieval-Augmented Generation (RAG)
 
 Why pure LLMs hallucinate
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 Incremental system evolution
 
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 🛠️ Tech Stack
 
 Backend
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 Virtual Environments (venv)
 
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 ⚙️ Setup & Run Locally
 
 1️⃣ Clone Repository
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 uvicorn main:app --reload
 
 
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 ⚠️ Known Limitations
 
 Scanned/image-only PDFs require OCR (not included)
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 background workers
 
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 🚀 Live Demo
 
 👉 Hugging Face Spaces