refactor: added NoArgsConstructor annotation

src/main/java/com/guide/server/Student.java

 package com.guide.server;
 
-import lombok.AllArgsConstructor;
-import lombok.Builder;
-import lombok.Getter;
-import lombok.Setter;
+import lombok.*;
 
 import javax.persistence.*;
 
 @Entity
 @AllArgsConstructor
+@NoArgsConstructor
 @Getter
 @Builder
 @Setter