Fix: Space README frontmatter; HF Job inner cmd installs git, fails loudly on pip errors

Wave 1.4: README rewrite, blog skeleton, video script, asset templates

Rewrite README with research-backed structure

Add baseline results, outputs dir, and backup Groq fallback

Fix Dockerfile COPY and README cleanup

Add comprehensive README with action/observation docs, setup guide, and architecture

Add propagation engine, log templates, and updated models