chore: update referral logic

src/modules/blogs/entities/blog-category.entity.ts

@@ -20,6 +20,6 @@ export class BlogCategory extends BaseEntity {
   @OneToMany(() => Blog, (blog) => blog.category)
   blogs: Blog[];
 
-  @DeleteDateColumn({ type: "timestamptz" })
+  @DeleteDateColumn()
   deletedAt?: Date;
 }