fix: preflight member records before rules

tests/test_repository.py

@@ -108,6 +108,19 @@ def test_repository_reports_empty_contributions_file(tmp_path) -> None:
     assert any("contributions.json" in error for error in repository.validate())
 
 
+def test_repository_rejects_structurally_invalid_member_json(tmp_path) -> None:
+    repository = MemberRepository(tmp_path)
+    repository.initialize()
+    member = repository.create_member(first_name="Invalid", last_name="Structure")
+    path = repository.members_root / member.member_id / "member.json"
+    raw = json.loads(path.read_text(encoding="utf-8"))
+    raw["person"] = []
+    path.write_text(json.dumps(raw), encoding="utf-8")
+
+    with pytest.raises(RepositoryError, match="person muss ein JSON-Objekt sein"):
+        repository.preflight_member_record(member.member_id)
+
+
 def test_member_path_rejects_traversal(tmp_path) -> None:
     repository = MemberRepository(tmp_path)
     repository.initialize()