docs(spec): clean analyst bootstrap — greenfield redesign
Single-paste web→Claude Code workspace bootstrap. PAT-only auth,
non-interactive `da init`, slim CLI surface (init/pull/push/snapshot),
lazy-mkdir contract for empty-folder discipline, AGNES_WORKSPACE.md
human docs, layered per-workspace config, comprehensive clean-install
verification protocol.
Greenfield rewrite — drops `da analyst setup`, `da sync`, `da fetch`,
`da metrics`, `da skills`. Removes legacy `data/{parquet,duckdb,metadata}/`
and `user/artifacts/` workspace dirs.
8cbf0aa818