docs: promote industry chain map method to public docs

Cai

2026-08-24 15ae32f37284059d443dcae0a677b6f4522b02ea

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SELECT ordinal_position, column_name, data_type, column_type, is_nullable, column_key
FROM information_schema.columns
WHERE table_schema = 'trading_xuntou'
  AND table_name = 'cn_stock_kline_1d_front'
ORDER BY ordinal_position;