日常事务-处分管理 添加印章图片签名验证功能

- 实现了图片签名工具类ImageSignUtils，支持生成和验证带时间戳的签名URL
- 配置SecurityConfig允许匿名访问签名的印章图片URL，但Base64接口需认证
- 创建StampController提供受保护的印章图片访问接口
- 将应用默认文件路径配置改为Windows环境路径
- 支持通过签名URL安全访问印章图片资源

srs-admin/src/main/resources/application.yml

@@ -9,7 +9,7 @@ srs:
   # 实例演示开关
   demoEnabled: true
   # 文件路径 示例( Windows配置D:/srs/uploadPath,Linux配置 /home/srs/uploadPath)#D:/srs/uploadPath
-  profile: /usr/local/java/srs/uploadPath  #/usr/local/java/srs/uploadPath
+  profile: D:/srs/uploadPath  #/usr/local/java/srs/uploadPath
   #profile: D:/srs/uploadPath  #/srs/uploadPath
   # 获取ip地址开关
   addressEnabled: false