Add summary statistics and macroeconomic data files for 2025

- Created summary_statistics.csv with total news articles and key metrics from January 1 to October 13, 2025.
- Added 一号文件十四五十五五规划情况.csv detailing keyword occurrences related to planning documents.
- Introduced 主要宏观经济数据.csv capturing mentions of key economic indicators.
- Included 国外交流随行企业与企业家名单.csv listing leaders and their engagements with foreign enterprises.
- Added 国家领导人考察行程清单.csv documenting leaders' inspection itineraries.
- Created 国际合作与外交动态.csv summarizing international cooperation and diplomatic activities.
- Added 高频行业关键词统计.csv with statistics on frequently mentioned industry keywords.

research/xwlb25_01_25_10/高频行业关键词统计.csv

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+关键词,出现次数,占比,最新提及日期,产业领域
+人工智能,335,10.95%,2025-10-11,数字经济
+新能源,266,8.70%,2025-10-12,绿色能源
+数字经济,123,4.02%,2025-10-11,数字经济
+大数据,74,2.42%,2025-10-09,数字经济
+新材料,63,2.06%,2025-10-12,先进材料
+全国统一大市场,54,1.77%,2025-10-09,经济政策
+航空航天,51,1.67%,2025-10-04,高端制造
+5G,48,1.57%,2025-10-07,数字经济
+生物医药,40,1.31%,2025-09-27,生命健康
+人形机器人,34,1.11%,2025-10-08,智能制造
+集成电路,31,1.01%,2025-09-15,半导体
+物联网,29,0.95%,2025-10-12,数字经济
+芯片,28,0.92%,2025-10-12,半导体
+工业机器人,26,0.85%,2025-09-28,智能制造
+智能制造,25,0.82%,2025-10-09,制造业
+绿色能源,23,0.75%,2025-09-10,其他
+电动汽车,22,0.72%,2025-09-20,其他
+轨道交通,17,0.56%,2025-10-12,其他
+半导体,13,0.43%,2025-10-06,半导体
+云计算,12,0.39%,2025-09-11,其他
+高端制造,9,0.29%,2025-09-11,制造业
+区块链,3,0.10%,2025-09-25,其他
+数控机床,2,0.07%,2025-05-01,其他
+工业软件,1,0.03%,2025-04-28,软件产业