Round out IB-WP-0014 with the remaining archive operations and docs.
- restore_archive() and `infospace-bench restore <pkg> --target <dir>` round-trip
a finalized package's bytes back to disk. Refuses to overwrite a non-empty
target unless --force. --from <infospace-root> resolves the store location.
- archive-list CLI with --with-retention flag; annotate_retention() opens the
per-infospace registry and joins each record with its current retention
state (effective class, expires, holds, eligibility).
- docs/archive-integration.md covers when to archive, the include set,
retention classes, storage layout, credentials policy, and the explicit
non-goal that S3/git backends live in artifact-store.
- SCOPE.md cross-links the new doc.
- Workplan flipped to status: done. Full pytest suite: 72 passed.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
