Research OS v0.1.0

First judge-ready Research OS milestone. Includes the governed model-agnostic backend, modular GitHub integration, evidence-first Streamlit dashboard, non-root Docker deployment, Mythar Compiler v2 / ISF v0.4 integration, documentation, and automated tests. Verified with 20 passing tests, clean Ruff lint, green GitHub CI, a healthy Docker container, and the public Streamlit demo.