fix(HEL-494): 数据中枢独占调度，主网站不再回退旧接口

主网站只向中枢要业务数据；来源选择、切源、补数全部在中枢内部完成，失败不再走东财/腾讯/Tushare 保底。

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

backend/data/providers/tushare_indices.py

@@ -63,22 +63,8 @@ class IndexMixin:
         if callable(hub):
             rows = hub()
             if rows:
-                try:
-                    return self._hub_realtime_market_indices(requested_date, rows)
-                except TushareError:
-                    pass
-        try:
-            payload = self._tushare_realtime_market_indices(requested_date)
-            marker = getattr(self, "record_datahub_legacy", None)
-            if callable(marker):
-                marker("index_quotes", "tushare_rt_idx_k")
-            return payload
-        except TushareError:
-            payload = self._free_realtime_market_indices(requested_date)
-            marker = getattr(self, "record_datahub_legacy", None)
-            if callable(marker):
-                marker("index_quotes", str(payload.get("source") or "eastmoney_push2"))
-            return payload
+                return self._hub_realtime_market_indices(requested_date, rows)
+        raise TushareError("Realtime index quotes are incomplete")
 
     def _hub_realtime_market_indices(
         self,
@@ -199,50 +185,5 @@ class IndexMixin:
         }
 
     def _free_realtime_market_indices(self, requested_date: str) -> dict[str, Any]:
-        trade_date, _ = self.resolve_trade_context(requested_date)
-        aggregator = getattr(self, "realtime_aggregator", None)
-        if aggregator is None:
-            raise TushareError("免费实时源未配置")
-        quotes = aggregator.eastmoney_indices()
-        index_names = {
-            "000001": ("000001.SH", "上证指数"),
-            "399001": ("399001.SZ", "深证成指"),
-            "399006": ("399006.SZ", "创业板指"),
-        }
-        indices = []
-        for quote in quotes:
-            mapped = index_names.get(str(quote.get("code") or ""))
-            if not mapped:
-                continue
-            ts_code, name = mapped
-            close = _number(quote.get("price"))
-            previous_close = _number(quote.get("previous_close"))
-            if close <= 0 or previous_close <= 0:
-                continue
-            indices.append(
-                {
-                    "ts_code": ts_code,
-                    "name": str(quote.get("name") or name).strip(),
-                    "trade_date": trade_date,
-                    "close": close,
-                    "pct_chg": round(_number(quote.get("change")) or (close / previous_close - 1) * 100, 3),
-                    "return_5d": 0,
-                    "amount_billion": round(_number(quote.get("amount_billion")), 2),
-                    "quote_time": quote.get("quote_time") or "",
-                    "source": quote.get("source") or "eastmoney_push2",
-                }
-            )
-        if len(indices) != 3:
-            raise TushareError("Realtime index quotes are incomplete")
-        return {
-            "trade_date": trade_date,
-            "source": "eastmoney_push2",
-            "realtime": True,
-            "precise": True,
-            "indices": indices,
-            "aggregate": {
-                "average_pct_chg": round(sum(item["pct_chg"] for item in indices) / len(indices), 3),
-                "average_return_5d": 0,
-                "average_return_20d": 0,
-            },
-        }
+        del requested_date
+        raise TushareError("主网站不再直连免费行情源，请走数据中枢")