fix: backfill auction amount history on fresh deployments

tests/test_market_insights.py

@@ -18,6 +18,11 @@ class FakeMarketClient:
     def query(self, api_name, params=None, fields=""):
         params = params or {}
         date = params.get("trade_date", "")
+        if api_name == "trade_cal":
+            return [
+                {"cal_date": f"202607{day:02d}", "is_open": 1}
+                for day in range(14, 24)
+            ]
         if api_name == "stock_basic":
             return [
                 {"ts_code": "000001.SZ", "name": "平安银行", "industry": "银行", "market": "主板", "list_date": "19910403"},
@@ -96,6 +101,7 @@ class MarketInsightsTests(unittest.TestCase):
         self.assertEqual(payload["rows"][0]["expectation"], "超预期")
         self.assertEqual(set(payload["expectations"]), {"超预期", "符合预期", "低于预期"})
         self.assertFalse(payload["news_feedback"]["available"])
+        self.assertEqual(len(payload["amount_history"]), 10)
         self.assertEqual(payload["amount_history"][-1]["stock_count"], 2)
         self.assertEqual(payload["focus_rows"][0]["code"], "000001")