refactor(review): sibling-consistent naming + module import; assert mark-reviewed git round-trip

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/tests/test_mark_reviewed.py

@@ -42,10 +42,17 @@ def test_mark_reviewed_clears_flag(app_with_fake_gitea):
         r = client.post("/api/projects/default/rfcs/feat/mark-reviewed")
         assert r.status_code == 200
         row = db.conn().execute(
-            "SELECT unreviewed, reviewed_by FROM cached_rfcs WHERE slug='feat'"
+            "SELECT unreviewed, reviewed_at, reviewed_by FROM cached_rfcs WHERE slug='feat'"
         ).fetchone()
         assert row["unreviewed"] == 0
         assert row["reviewed_by"] == "ben"
+        assert row["reviewed_at"]  # provenance stamped
+        # git-side: the entry file on main was rewritten with the cleared flag.
+        from app import entry as entry_mod
+        written = fake.files[("wiggleverse", "meta", "main", "rfcs/feat.md")]["content"]
+        e = entry_mod.parse(written)
+        assert e.unreviewed is False
+        assert e.reviewed_by == "ben"
 
 
 def test_mark_reviewed_forbidden_for_non_superuser(app_with_fake_gitea):