archive: include contracts/, schemas/; report skipped top-level dirs

Two of yesterday's archives silently dropped infospace content: the default
include set was missing contracts/, so wealth-vsm-generation-pilot (16 files)
and wealth-vsm-legacy-slice (12 files) were preserved as 14 and 10 files
respectively. Fix the include set and make silent drops visible.

- DEFAULT_INCLUDE now: infospace.yaml, artifacts, contracts, schemas,
  workflows, output, reports, exports
- ArchiveRecord gains skipped_top_level: top-level entries present in the
  live root that are not in the include set, not excluded, and not auto-
  hidden (hidden dotfiles, empty dirs, .store/index.yaml). Surfaces in
  index.yaml only when non-empty.
- Re-archived the two affected pilots with correct counts. Prior records
  remain in each index.yaml as history.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/test_archive.py

@@ -25,6 +25,16 @@ from infospace_bench.archive import (
 )
 
 
+def _restored_paths_via_round_trip(
+    record: ArchiveRecord, source: Path, tmp_path: Path
+) -> list[str]:
+    target = tmp_path / f"restore-{record.package_id[:8]}"
+    result = restore_archive(
+        record.package_id, target=target, source_infospace=source,
+    )
+    return list(result.restored_paths)
+
+
 def _seed_infospace(workspace: Path, slug: str = "demo") -> Path:
     create_infospace(workspace, slug, name="Demo", topic_domain="Test")
     root = workspace / "infospaces" / slug
@@ -188,6 +198,33 @@ def test_annotate_retention_returns_state_for_each_archive(tmp_path: Path) -> No
         assert retention["eligible_for_deletion"] is False
 
 
+def test_archive_default_include_captures_contracts_and_schemas(
+    tmp_path: Path,
+) -> None:
+    root = _seed_infospace(tmp_path)
+    (root / "contracts").mkdir()
+    (root / "contracts" / "entity.contract.md").write_text(
+        "# contract\n", encoding="utf-8"
+    )
+    (root / "schemas").mkdir()
+    (root / "schemas" / "entity.schema.json").write_text("{}", encoding="utf-8")
+
+    record = archive_infospace(root)
+    assert "contracts/entity.contract.md" in [
+        rel for rel in _restored_paths_via_round_trip(record, root, tmp_path)
+    ]
+
+
+def test_archive_surfaces_skipped_top_level_dirs(tmp_path: Path) -> None:
+    root = _seed_infospace(tmp_path)
+    (root / "experimental").mkdir()
+    (root / "experimental" / "scratch.md").write_text("scratch", encoding="utf-8")
+    (root / "empty-dir").mkdir()  # empty: not flagged
+
+    record = archive_infospace(root)
+    assert record.skipped_top_level == ["experimental"]
+
+
 def test_annotate_retention_returns_none_when_store_missing(tmp_path: Path) -> None:
     root = _seed_infospace(tmp_path)
     archive_infospace(root, store_root=tmp_path / "external-store")