refactor(common&service): adjust id range and remove unused qr code method

1. 调整RandomIdHelper的默认ID生成范围从16位改为13位
2. 从IUserJournalService和UserJournalService中移除废弃的单例生成二维码方法
3. 为相关DTO添加JSON数字序列化/反序列化配置，处理前后端数字类型兼容问题
4. 修改二维码内容序列化逻辑，将数字转为字符串避免精度丢失

QYZH.InteractiveMagazine.IService/IUserJournalService.cs

@@ -31,14 +31,6 @@ public interface IUserJournalService : IBaseService<UserJournal>
     /// <param name="id">绑定记录Id</param>
     Task UnbindJournalAsync(long userId, long id);
 
-    /// <summary>
-    /// 生成期刊二维码记录
-    /// </summary>
-    /// <param name="input">生成输入</param>
-    /// <param name="operatorName">操作人名称</param>
-    /// <returns>二维码记录</returns>
-    Task<UserJournalQrCodeOutput> CreateQrCodeAsync(CreateUserJournalQrCodeInput input, string operatorName);
-
     /// <summary>
     /// 批量提交期刊二维码生成任务
     /// </summary>