Run /speckit-specify — Workspace + Sidecar Foundation (Feature 001)

The first feature spec for augment-it after the constitution lands. Scope: the workspace package and bun sidecar that everything else depends on, plus exactly one read-only capability (records.import) end-to-end to prove the pipe. No federation yet. No research agents yet. No chat surface implementation yet. Just the foundation that makes every subsequent feature possible — and a CSV import that lands rows in the workspace and persists them to disk.