新增三大股东接口, 补充 SKILLS.md 使用说明书

- 新增 十大流通股东/十大股东明细/股东户数 三个抓取模块并接入 API
- 冒烟测试扩展至 30 用例, 全部通过
- 新增 SKILLS.md (给其他 agent 使用的工具说明书)
- 补充待优化端点清单与文档对齐规范

docs/api_docs.md

@@ -274,3 +274,64 @@ Sec-Fetch-Mode: cors
 Sec-Fetch-Dest: empty
 Referer: https://emchoicew.eastmoney.com/
 Accept-Encoding: gzip, deflate, br
+
+## 十大流通股东
+---
+GET /api/data/v1/get?source=CHOICE&reportName=RPT_F10_EH_FREEHOLDERS&columns=F10_FREEHOLDERS&quoteColumns=&pageNumber=&pageSize=&sortColumns=END_DATE,HOLD_NUM&client=SW&filter=(SECUCODE=%22603233.SH%22)(END_DATE%3E=%272024-01-01%27)(END_DATE%3C=%272026-12-31%27)&sortTypes=-1,-1 HTTP/1.1
+Host: datacenter-choice.eastmoney.com
+Connection: keep-alive
+sec-ch-ua: "Chromium";v="104"
+Accept: application/json
+version: 
+sec-ch-ua-mobile: ?0
+User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.102 Safari/537.36
+token: 
+sec-ch-ua-platform: "Windows"
+Origin: https://emchoicew.eastmoney.com
+Accept-Language: zh-CN,zh;q=0.9
+Sec-Fetch-Site: same-site
+Sec-Fetch-Mode: cors
+Sec-Fetch-Dest: empty
+Referer: https://emchoicew.eastmoney.com/
+Accept-Encoding: gzip, deflate, br
+
+## 十大股东明细
+---
+GET /api/data/v1/get?source=CHOICE&reportName=RPT_DMSK_HOLDERS&columns=SECUCODE,SECURITY_CODE,ORG_CODE,SECURITY_TYPE_CODE,END_DATE,RANK,HOLDER_CODE,HOLDER_NAME,HOLD_NUM,HOLD_RATIO,HOLD_NUM_CHANGE,HOLD_RATIO_CHANGE,DIRECTION,SHARES_TYPE,HOLDER_NATURE,REPORT_TYPE,HOLD_CHANGE,NOTICE_DATE,HOLD_RATIO_YOY,REPORT_DATE_NAME,REFERENCE_MARKET_CAP&quoteColumns=&filter=(SECUCODE=%22603233.SH%22)(END_DATE%3E=%272022-01-01%27)(END_DATE%3C=%272026-12-31%27)&pageNumber=&pageSize=&sortTypes=-1,1&sortColumns=END_DATE,RANK&client=SW HTTP/1.1
+Host: datacenter-choice.eastmoney.com
+Connection: keep-alive
+sec-ch-ua: "Chromium";v="104"
+Accept: application/json
+sec-ch-ua-mobile: ?0
+User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.102 Safari/537.36
+sec-ch-ua-platform: "Windows"
+Origin: https://emchoicew.eastmoney.com
+Accept-Language: zh-CN,zh;q=0.9
+Sec-Fetch-Site: same-site
+Sec-Fetch-Mode: cors
+Sec-Fetch-Dest: empty
+Referer: https://emchoicew.eastmoney.com/
+Accept-Encoding: gzip, deflate, br
+
+
+
+## 股东户数
+---
+GET /api/data/v1/get?source=CHOICE&reportName=RPT_F10_EH_HOLDERNUM&columns=CHOICEF9_EH_HOLDERNUM&quoteColumns=&filter=(SECUCODE=%22603233.SH%22)(END_DATE%3E=%272022-01-01%27)(END_DATE%3C=%272026-12-31%27)&pageNumber=&pageSize=&sortColumns=END_DATE&client=SW&sortTypes=-1 HTTP/1.1
+Host: datacenter-choice.eastmoney.com
+Connection: keep-alive
+sec-ch-ua: "Chromium";v="104"
+Accept: application/json
+version: 
+sec-ch-ua-mobile: ?0
+User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.5112.102 Safari/537.36
+token: 
+sec-ch-ua-platform: "Windows"
+Origin: https://emchoicew.eastmoney.com
+Accept-Language: zh-CN,zh;q=0.9
+Sec-Fetch-Site: same-site
+Sec-Fetch-Mode: cors
+Sec-Fetch-Dest: empty
+Referer: https://emchoicew.eastmoney.com/
+Accept-Encoding: gzip, deflate, br
+