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

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

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

feat: Phase 3 types/constants, ARCHITECTURE.md, HF connect script, tasks update

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

chore: tasks.md reflects 102/0 tests, all bugs fixed, future roadmap noted

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

feat: implement all M01-M13, X01-X04 modules + quality gate fixes

Switch Space to local-first real model backend

Confirm Phase 1 remote deployment

Update Phase 1 deployment checklist

Build Phase 1 HearthNet Space