[ADD] コースの作成者を管理するためのテーブルを追加しました。

src/main/java/com/example/demo/app/infra/entity/CourseOwnerEntity.java

@@ -0,0 +1,37 @@
+package com.example.demo.app.infra.entity;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToOne;
+import jakarta.persistence.Table;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Table(name = "course_owner_t")
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class CourseOwnerEntity {
+	
+	@Id
+	@GeneratedValue(strategy = GenerationType.IDENTITY)
+	private Long courseOwnerId;
+	
+	@ManyToOne(fetch = FetchType.LAZY)
+	@JoinColumn(name = "user_id")
+	private UserEntity userEntity;
+	
+	@OneToOne(fetch = FetchType.LAZY)
+	@JoinColumn(name = "course_id")
+	private CourseEntity courseEntity;
+	
+	
+}

src/main/java/com/example/demo/app/infra/repository/CourseOwnerRepository.java

@@ -0,0 +1,9 @@
+package com.example.demo.app.infra.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import com.example.demo.app.infra.entity.CourseOwnerEntity;
+
+public interface CourseOwnerRepository extends JpaRepository<CourseOwnerEntity, Long>{
+
+}