Merge remote-tracking branch 'origin/2.0' into 2.0

luofl

2025-04-11 a9edc2f62628007e2c5e86d416d484780238f13f

 cloud-server-course/src/main/java/com/dsh/course/feignclient/account/model/Student.java

@@ -70,4 +70,9 @@
     * 是否默认 1默认 2不是默认
     */
    private Integer isDefault;
    /**
     * 课时有效期
     */
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
    private Date validity;
}