Fix: README.md as UTF-8 text; force *.md as text

.gitattributes

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README.md

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-# FastAPI RAG API
-
-**Live demo**
-- API (HF Space): https://huggingface.co/spaces/HamidOmarov/FastAPI-RAG-API
-- Dashboard (HF Space): https://huggingface.co/spaces/HamidOmarov/RAG-Dashboard
-
-## What it does
-Ask questions about your PDFs using vector search (FAISS) + sentence embeddings.
-Robust to numeric/table-heavy docs, with AZ>EN translation and fallbacks.
-
-## Quick test
-curl -F "[email protected]" https://<api>/upload_pdf
-curl -H "Content-Type: application/json" ^
-  -d "{\"question\":\"What is the document about?\",\"top_k\":5}" https://<api>/ask_question
-
-## Ops
-- GET /health  - GET /stats  - POST /reset_index
-
-## Stack
-FastAPI � FAISS � sentence-transformers � pdfminer.six � Hugging Face Spaces
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