Part of EPIC #117 Tasks: - W3.1 Remove node-llama-cpp dep + postinstall + build externals - W3.2 Remove modelDownloader.ts + all imports - W3.3 Remove test-llama.ts - W3.4 Cleanup BRAIN_EMBED_ENABLE, remove in-process llama code paths, update ROADMAP
Part of EPIC #117
Tasks: