feat: 태그 엔티티, 레포 추가

Author: zoooooz2

src/main/java/com/windfall/domain/tag/entity/Tag.java

@@ -0,0 +1,26 @@
+package com.windfall.domain.tag.entity;
+
+import com.windfall.domain.auction.entity.Auction;
+import com.windfall.global.entity.BaseEntity;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Getter
+@AllArgsConstructor
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Tag extends BaseEntity {
+
+  @ManyToOne
+  @JoinColumn(name = "auction_id", nullable = false)
+  private Auction auction;
+
+  @Column(nullable = false)
+  private String tagName;
+}

src/main/java/com/windfall/domain/tag/repository/TagRepository.java

@@ -0,0 +1,8 @@
+package com.windfall.domain.tag.repository;
+
+import com.windfall.domain.tag.entity.Tag;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface TagRepository extends JpaRepository<Tag, Long> {
+
+}