Backend type.
Optional urlConnection URL (for Postgres/Qdrant).
Optional pathFile path (for SQLite).
Optional connectionPostgres connection string.
Optional sourceHow this config was created.
Optional containerDocker container name if applicable.
Optional setupISO timestamp of when setup was performed.
Persisted vector store configuration at ~/.wunderland/vector-store.json. Written after successful auto-setup, read by all subsequent commands.