feat(stock): market_events (급변·거래량Z·외인순매도)

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

stock/app/test_holdings_intel.py

@@ -188,3 +188,18 @@ def test_technical_posture_empty_kospi_not_penalized():
     scores = hi.technical_posture(ctx, ["005930"])
     # ma_alignment+momentum만으로 정규화 → 상승추세면 충분히 높은 점수
     assert scores["005930"] > 50.0
+
+
+# ---- Phase 3 tests ----
+
+DEFAULT_EVENT = {"move_pct": 7.0, "vol_z": 2.5}
+
+
+def test_market_events_detects_move_and_volume():
+    closes = [1000]*30 + [1100]   # 마지막날 +10%
+    vols = [1000]*30 + [10000]    # 거래량 급증
+    df = _ticker_prices(closes, vols)
+    evts = hi.market_events("005930", df, None, DEFAULT_EVENT)
+    types = {e["type"] for e in evts}
+    assert "price_move" in types
+    assert "volume_surge" in types