fix: Gradio 6.0 compatibility — move css to launch(), remove Chatbot type arg

feat: model selector, progress bar, sources panel, chat export, CSV parsing, dockerignore

feat: Python package, FastAPI REST server, TypeScript SDK

fix: remove gradio pin + drop type='messages' for HF Spaces 6.6.0 compat

fix: pin gradio==4.44.1 to resolve type='messages' runtime error

fix: model singleton cache, dedup guard, Gradio type=messages

fix: sentence-aware chunking, score threshold, DOCX tables, streaming error handling, LLM_MODEL env var

feat: apply all 15 upgrades — BGE embeddings, cosine FAISS, streaming LLM, tenacity retry, dotenv, Dockerfile, tests

Update README with Kerdos Infrasoft branding, demo notice, and funding CTA

Add Kerdos Infrasoft branding, demo banner, and funding CTA

Fix Gradio 6.x compatibility errors