docs: real semantic RAG, wired sponsor backends, multi-model contract note

chore: new tests, security audit, coverage enhancements, requirements update

Update README.md

docs: Update README with built artifacts and GitHub links

Build: Add Android APK, PWA, and deployment guide

feat: Nemotron Space, Modal backend, sponsor prize targeting, improvements doc

docs: full README rewrite for hackathon — YAML tags, screenshots, author links, prize targets

feat: Phase 3 wired + plant tool + MoE bus + model distribution always-on

feat: Phase 2 (M14-M25, X05-X07) + Phase 3 experimental (M26-M31) + E2E tests + docs

Update README.md

initial commit