fix(CORE-001D): close boundary review gaps

tests/test_event_comparison_ui.py

@@ -11,6 +11,13 @@ from app.services.event_comparison_ui import EventComparisonFixtureHistoricalPri
 def test_event_comparison_page_service_accepts_string_and_decimal_boundary_values() -> None:
     service = EventComparisonPageService()
 
+    preview = service.preview_scenario(
+        preset_slug="gld-jan-2024-selloff",
+        template_slugs=("protective-put-atm-12m",),
+        underlying_units="1000.0",
+        loan_amount=Decimal("68000.0"),
+        margin_call_ltv="0.75",
+    )
     report = service.run_read_only_comparison(
         preset_slug="gld-jan-2024-selloff",
         template_slugs=("protective-put-atm-12m", "protective-put-95pct-12m"),
@@ -19,6 +26,9 @@ def test_event_comparison_page_service_accepts_string_and_decimal_boundary_value
         margin_call_ltv="0.75",
     )
 
+    assert preview.initial_portfolio.underlying_units == 1000.0
+    assert preview.initial_portfolio.loan_amount == 68000.0
+    assert preview.initial_portfolio.margin_call_ltv == 0.75
     assert report.scenario.initial_portfolio.underlying_units == 1000.0
     assert report.scenario.initial_portfolio.loan_amount == 68000.0
     assert report.scenario.initial_portfolio.margin_call_ltv == 0.75

tests/test_price_feed.py

@@ -75,6 +75,35 @@ async def test_price_feed_discards_malformed_cached_payload_and_refetches(monkey
     assert feed._cache.writes[0][0] == "price:GLD"
 
 
+@pytest.mark.asyncio
+async def test_price_feed_discards_cached_payload_missing_required_price_and_refetches(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    feed = PriceFeed()
+    feed._cache = _CacheStub({"price:GLD": {"symbol": "GLD", "timestamp": "2026-03-26T12:00:00+00:00"}})
+
+    async def fake_fetch(symbol: str):
+        return {
+            "symbol": symbol,
+            "price": 205.0,
+            "currency": "USD",
+            "timestamp": datetime(2026, 3, 26, 12, 3, tzinfo=timezone.utc),
+            "source": "yfinance",
+        }
+
+    monkeypatch.setattr(feed, "_fetch_yfinance", fake_fetch)
+
+    data = await feed.get_price("GLD")
+
+    assert data == PriceData(
+        symbol="GLD",
+        price=205.0,
+        currency="USD",
+        timestamp=datetime(2026, 3, 26, 12, 3, tzinfo=timezone.utc),
+        source="yfinance",
+    )
+
+
 @pytest.mark.asyncio
 async def test_price_feed_rejects_invalid_provider_payload() -> None:
     feed = PriceFeed()