Fix Docker build: upgrade Python to 3.11 for networkx compatibility

Add Hugging Face deployment configuration files

Initial plan

Fix: Unpin all dependencies to support Python 3.13 default in Render

Fix: Enforce Python 3.11.9 and use pinned wheels for fast build

Fix: Relax dependency versions for Python 3.13 compatibility

Optimize: Remove unused heavy dependencies (torch, transformers) to speed up build

Refactor: Move project to root of repository