fix(stocksdk): normalize realtime change percentage

backend/app/plugins/stocksdk/provider.py

@@ -203,7 +203,16 @@ class StockSDKProvider:
         except bridge.StockSDKBridgeError as e:
             logger.warning("stock-sdk realtime 拉取失败: %s", e)
             return []
-        return result.get("rows") or []
+        rows = result.get("rows") or []
+        normalized: list[dict] = []
+        for row in rows:
+            item = dict(row)
+            # stock-sdk 的 changePercent 是百分数值(-1.15 = -1.15%);
+            # provider 入口契约统一使用小数制(-0.0115 = -1.15%)。
+            if item.get("change_pct") is not None:
+                item["change_pct"] = float(item["change_pct"]) / 100
+            normalized.append(item)
+        return normalized
 
     # ---- instruments (标的维表) ----
     def get_instruments(self, asset_type: str = "stock") -> list[dict]: