feat(HEL-490): 剩余行情改由数据中枢主线路提供

正式页面以 8766 为主线路，旧接口只作故障备用；compose 钉死全部 DATAHUB_READ_*，避免现网残留 0 造成假完成。

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

backend/data/datahub/route_state.py

@@ -0,0 +1,57 @@
+from __future__ import annotations
+
+from datetime import datetime
+from threading import Lock
+from typing import Any
+
+from backend.data.datahub.settings import DATASETS
+
+DATASET_LABELS = {
+    "calendar": "交易日历",
+    "stocks": "股票主档",
+    "daily": "个股日K",
+    "index_daily": "指数日K",
+    "valuation": "估值",
+    "moneyflow": "资金流",
+    "auction": "竞价",
+    "limit_events": "涨停池",
+    "popularity": "人气榜",
+    "dragon_tiger": "龙虎榜",
+    "sector_daily": "题材板块",
+    "quotes": "全市场实时行情",
+    "index_quotes": "指数实时行情",
+    "intraday": "分时",
+    "status": "数据集状态",
+}
+
+
+class DatahubRouteLedger:
+    def __init__(self) -> None:
+        self._lock = Lock()
+        self._rows: dict[str, dict[str, Any]] = {}
+
+    def record(self, dataset: str, route: str, source: str = "", error: str = "") -> None:
+        name = str(dataset or "").strip() or "unknown"
+        with self._lock:
+            self._rows[name] = {
+                "dataset": name,
+                "label": DATASET_LABELS.get(name, name),
+                "route": "legacy" if route == "legacy" else "datahub",
+                "source": str(source or "").strip(),
+                "error": str(error or "").strip(),
+                "at": datetime.now().astimezone().isoformat(timespec="seconds"),
+            }
+
+    def snapshot(self) -> list[dict[str, Any]]:
+        with self._lock:
+            rows = [dict(item) for item in self._rows.values()]
+        order = {name: index for index, name in enumerate(DATASETS)}
+        rows.sort(key=lambda item: (order.get(str(item.get("dataset")), 99), str(item.get("dataset"))))
+        return rows
+
+    def clear(self) -> None:
+        with self._lock:
+            self._rows.clear()
+
+
+LEDGER = DatahubRouteLedger()