feat(cache): mirror §22.4c review fields into cached_rfcs

backend/tests/test_cache_review_fields.py

@@ -0,0 +1,24 @@
+"""§22.4c — _upsert_cached_rfc mirrors the review fields into cached_rfcs."""
+from __future__ import annotations
+
+from fastapi.testclient import TestClient
+
+from test_propose_vertical import app_with_fake_gitea, tmp_env  # noqa: F401
+
+
+def test_upsert_writes_review_fields(app_with_fake_gitea):
+    from app import cache, db, entry as entry_mod
+
+    app, _ = app_with_fake_gitea
+    with TestClient(app):
+        e = entry_mod.Entry(
+            slug="rev", title="Rev", state="active",
+            unreviewed=True, reviewed_at="2026-06-03", reviewed_by="ben",
+        )
+        cache._upsert_cached_rfc(e, body_sha="sha-rev")
+        row = db.conn().execute(
+            "SELECT unreviewed, reviewed_at, reviewed_by FROM cached_rfcs WHERE slug = 'rev'"
+        ).fetchone()
+        assert row["unreviewed"] == 1
+        assert row["reviewed_at"] == "2026-06-03"
+        assert row["reviewed_by"] == "ben"