feat: 调用日志实体新增 userName 字段及数据库迁移脚本

backend-single/src/main/java/com/emotion/entity/AiCallLog.java

@@ -29,6 +29,9 @@ public class AiCallLog extends BaseEntity {
     @TableField("user_id")
     private String userId;
 
+    @TableField("user_name")
+    private String userName;
+
     @TableField("request_id")
     private String requestId;
 

backend-single/src/main/resources/db/migration/V20260525__add_user_name_to_ai_call_log.sql

@@ -0,0 +1,2 @@
+-- 调用日志表新增 user_name 字段
+ALTER TABLE t_ai_call_log ADD COLUMN user_name VARCHAR(100) DEFAULT NULL COMMENT '用户昵称' AFTER user_id;