fix(HEL-494): 切断网站生产装配外源直连，iFinD 与实时观察改走中枢

生产 gateway 不再实例化 iFinD、东财图和免费实时聚合器；问财与竞价快照作为中枢内部数据源。全站阻断外源测试覆盖日K、报价、图表、问财和竞价快照。

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

backend/data/datahub/ifind_proxy.py

@@ -0,0 +1,145 @@
+from __future__ import annotations
+
+import time
+from typing import Any
+
+from backend.data.datahub.bridge import DatahubBridge
+from backend.data.datahub.errors import DatahubError
+from backend.data.providers.ifind_client import IfindError
+
+
+class HubIfindProxy:
+    """Website-facing iFinD facade. Talks only to xiaobai-datahub."""
+
+    def __init__(self, datahub: DatahubBridge) -> None:
+        self._datahub = datahub
+        self._status: dict[str, Any] | None = None
+        self._status_at = 0.0
+
+    @property
+    def configured(self) -> bool:
+        return bool(self.status().get("configured"))
+
+    def set_credentials(self, refresh_token: str, access_token: str = "") -> None:
+        self._status = None
+        self._status_at = 0.0
+
+    def status(self) -> dict[str, Any]:
+        now = time.monotonic()
+        if self._status is not None and now - self._status_at < 30:
+            return dict(self._status)
+        fallback = {"configured": False, "access_ready": False, "access_expires_at": ""}
+        if not self._datahub.settings.token:
+            self._status = fallback
+            self._status_at = now
+            return dict(fallback)
+        try:
+            rows = self._rows("ifind_status", {})
+        except IfindError:
+            self._status = fallback
+            self._status_at = now
+            return dict(fallback)
+        row = rows[0] if rows else {}
+        status = {
+            "configured": bool(row.get("configured")),
+            "access_ready": bool(row.get("access_ready")),
+            "access_expires_at": str(row.get("access_expires_at") or ""),
+        }
+        self._status = status
+        self._status_at = now
+        return dict(status)
+
+    def wencai(self, query: str, search_type: str = "stock", cache_ttl: int = 300) -> list[dict[str, Any]]:
+        return self._rows(
+            "ifind_wencai",
+            {"query": query, "search_type": search_type, "cache_ttl": cache_ttl},
+        )
+
+    def snapshots(
+        self,
+        codes: str | list[str],
+        indicators: list[str],
+        start_time: str,
+        end_time: str,
+        cache_ttl: int = 8,
+    ) -> list[dict[str, Any]]:
+        return self._rows(
+            "ifind_snapshots",
+            {
+                "codes": codes,
+                "indicators": indicators,
+                "start_time": start_time,
+                "end_time": end_time,
+                "cache_ttl": cache_ttl,
+            },
+        )
+
+    def history(
+        self,
+        codes: str | list[str],
+        indicators: list[str],
+        start_date: str,
+        end_date: str,
+        cache_ttl: int = 300,
+    ) -> list[dict[str, Any]]:
+        return self._rows(
+            "ifind_history",
+            {
+                "codes": codes,
+                "indicators": indicators,
+                "start_date": start_date,
+                "end_date": end_date,
+                "cache_ttl": cache_ttl,
+            },
+        )
+
+    def real_time(
+        self,
+        codes: str | list[str],
+        indicators: list[str],
+        cache_ttl: int = 10,
+    ) -> list[dict[str, Any]]:
+        return self._rows(
+            "ifind_realtime",
+            {"codes": codes, "indicators": indicators, "cache_ttl": cache_ttl},
+        )
+
+    def intraday(
+        self,
+        code: str,
+        start_time: str,
+        end_time: str,
+        cache_ttl: int = 20,
+    ) -> list[dict[str, Any]]:
+        return self._rows(
+            "ifind_intraday",
+            {
+                "code": code,
+                "start_time": start_time,
+                "end_time": end_time,
+                "cache_ttl": cache_ttl,
+            },
+        )
+
+    def test_connection(self) -> dict[str, Any]:
+        payload = self.real_time(
+            "000001.SH",
+            ["open", "high", "low", "latest", "preClose"],
+            cache_ttl=0,
+        )
+        return {
+            "ok": bool(payload),
+            "sample_time": str(payload[0].get("time") or "") if payload else "",
+        }
+
+    def _rows(self, api_name: str, params: dict[str, Any]) -> list[dict[str, Any]]:
+        try:
+            response = self._datahub.client.query_api(api_name, params)
+        except DatahubError as exc:
+            raise IfindError(str(exc) or "iFinD 数据中枢暂不可用") from exc
+        data = response.data
+        if isinstance(data, list):
+            return [dict(item) for item in data if isinstance(item, dict)]
+        if isinstance(data, dict):
+            return [dict(data)]
+        return []