feat: add dual-source quote health orchestration

tests/unit/service/test_market_quote_sync_service.py

@@ -0,0 +1,25 @@
+from datetime import datetime
+from decimal import Decimal
+
+from app.service.market_quote_sync_service import MarketQuoteSyncService
+
+
+def test_snapshot_parses_real_time_quote_fields() -> None:
+    snapshot = MarketQuoteSyncService._snapshot(7, "eastmoney_exchange", {
+        "last_price": "1.234", "previous_close": "1.2", "change_pct": "2.83",
+        "volume": "1000", "turnover_amount": "123456.78",
+    }, datetime(2026, 9, 10))
+
+    assert snapshot is not None
+    assert snapshot.last_price == Decimal("1.234")
+    assert snapshot.turnover_amount == Decimal("123456.78")
+    assert snapshot.source == "eastmoney_exchange"
+
+
+def test_snapshot_rejects_missing_or_non_positive_price() -> None:
+    assert MarketQuoteSyncService._snapshot(
+        7, "eastmoney_exchange", {"last_price": None}, datetime.now()
+    ) is None
+    assert MarketQuoteSyncService._snapshot(
+        7, "eastmoney_exchange", {"last_price": "0"}, datetime.now()
+    ) is None