feat(lotto): track_record + build_review_payload 집계

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lotto/tests/test_backtest_db.py

@@ -171,3 +171,21 @@ def test_get_calibrated_draw_nos(monkeypatch):
     nos = db.get_calibrated_draw_nos()
     assert isinstance(nos, set)
     assert {301, 302, 303}.issubset(nos)
+
+
+def test_track_record_and_review_payload(monkeypatch):
+    db = _fresh_db(monkeypatch)
+    _seed_draws(db, 40)
+    from app import backtest as bt
+    bt.run_forward_purchase(draw_no=40, k=20, pool_n=500, sample_seed=5)
+    bt.calibrate_winner(40, sample_m=200)
+
+    tr = bt.track_record()
+    assert "random_null" in tr["by_strategy"]
+    assert tr["by_strategy"]["random_null"]["n_tickets"] >= 20
+
+    payload = bt.build_review_payload(40)
+    assert payload["draw_no"] == 40
+    assert "winner_analysis" in payload     # 당첨조합 5분석치
+    assert "forward" in payload             # 이번 회차 전략별 성적
+    assert "calibration_trend" in payload