feat: implement /auth.md agent onboarding route and add ws broadcast improvements

feat: migrate agentmemory to agentcache namespace, endpoints, and tools

feat: obs lookup index, startup backfill, CORS wildcards, sync state in SQLite

fix: Hugging Face sync, routing, dashboard, and agent isolation bugs

feat: upscale & UX overhaul — blueprint split, debounce, tests, viewer enhancements, DX improvements

refactor: folder-based memory model replacing session-based storage