feat(HEL-463): 接入剩余行情数据到 datahub

扩展盘后正式集（涨跌停/人气/龙虎榜/板块日线）与盘中观察 API（报价/指数/分时），网站 bridge 按开关接入并回退旧链路；问天改为按数据依赖跟随开关，不再整栈强制旧路径。

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

tests/test_datahub_bridge.py

@@ -290,8 +290,8 @@ class DatahubBridgeTests(unittest.TestCase):
         self.assertEqual(canonical["vol"], 100000.0)
         self.assertEqual(canonical["amount"], 2000000.0)
 
-    def test_heaven_keeps_legacy_on_first_batch_even_when_read_flag_is_on(self) -> None:
-        """问天未永久冻结；首批只读接入仍走旧链路，后续迁移可以纳入。"""
+    def test_heaven_can_use_hub_when_dataset_flag_is_on(self) -> None:
+        """问天按数据依赖接入：已映射 API 跟随开关，不再整栈强制旧链路。"""
         self.assertTrue(looks_like_heaven("backend.features.heaven.market_context", "backend/features/heaven/market_context.py"))
         self.assertFalse(looks_like_heaven("backend.features.market.service", "backend/features/market/service.py"))
         client = FakeClient()
@@ -302,7 +302,8 @@ class DatahubBridgeTests(unittest.TestCase):
         )
         rows = wrapped.query("daily", {"trade_date": "20240902"}, "amount")
         self.assertEqual(rows[0]["amount"], 2000.0)
-        self.assertEqual(client.paths, [])
+        self.assertEqual(client.paths, ["/v1/bars/daily"])
+        self.assertEqual(legacy.calls, [])
 
     def test_status_flag_does_not_run_when_off_and_falls_back_when_on(self) -> None:
         off = DatahubBridge(flags(), FakeClient(error=DatahubError("UNAVAILABLE", "down")))