feat(HEL-421): 回补历史日历和指数并标记区间不完整

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

xiaobai-datahub/datahub/adapters/tushare.py

@@ -44,7 +44,10 @@ DATASET_API = {
     "auction": "stk_auction",
 }
 
-DEFAULT_INDEX_CODES = ("000001.SH", "399001.SZ", "399006.SZ", "000300.SH")
+# Website actual index usage: market cards / 90-day charts (SH/SZ/CYB) plus
+# screener 沪深300 benchmark (lookback up to 260 trading days).
+WEBSITE_INDEX_CODES = ("000001.SH", "399001.SZ", "399006.SZ", "000300.SH")
+DEFAULT_INDEX_CODES = WEBSITE_INDEX_CODES
 
 
 class TushareAdapter(MarketAdapter):