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>

xiaobai-datahub/datahub/logutil.py

@@ -12,6 +12,7 @@ from datahub.timeutil import isoformat
 _SECRET_KEYS = (
     "token", "password", "secret", "key", "authorization", "credential",
     "tushare_token", "datahub_token", "encryption_key", "cookie",
+    "ifind", "refresh_token", "access_token",
 )
 _SECRET_JSON = re.compile(
     r'(?i)("(?:' + "|".join(re.escape(key) for key in _SECRET_KEYS) + r')"\s*:\s*")([^"\\]*(?:\\.[^"\\]*)*)(")'