feat: 사용자 차단 관련 엔티티 및 DDL 작성 (#507)

* feat: 사용자 차단 엔티티 작성

* feat: 사용자 차단 테이블 DDL 작성

Author: whqtker

src/main/java/com/example/solidconnection/siteuser/domain/UserBlock.java

@@ -0,0 +1,37 @@
+package com.example.solidconnection.siteuser.domain;
+
+import com.example.solidconnection.common.BaseEntity;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.Table;
+import jakarta.persistence.UniqueConstraint;
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@Entity
+@AllArgsConstructor
+@Table(uniqueConstraints = {
+        @UniqueConstraint(
+                name = "uk_user_block_blocker_id_blocked_id",
+                columnNames = {"blocker_id", "blocked_id"}
+        )
+})
+public class UserBlock extends BaseEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+    @Column(name = "blocker_id", nullable = false)
+    private long blockerId;
+
+    @Column(name = "blocked_id", nullable = false)
+    private long blockedId;
+}

src/main/resources/db/migration/V32__add_user_block_table.sql

@@ -0,0 +1,12 @@
+CREATE TABLE user_block
+(
+    id          BIGINT       NOT NULL AUTO_INCREMENT,
+    blocker_id  BIGINT       NOT NULL,
+    blocked_id  BIGINT       NOT NULL,
+    created_at  DATETIME(6)  NOT NULL,
+    updated_at  DATETIME(6)  NOT NULL,
+    PRIMARY KEY (id),
+    CONSTRAINT uk_user_block_blocker_id_blocked_id UNIQUE (blocker_id, blocked_id),
+    CONSTRAINT fk_user_block_blocker_id FOREIGN KEY (blocker_id) REFERENCES site_user (id),
+    CONSTRAINT fk_user_block_blocked_id FOREIGN KEY (blocked_id) REFERENCES site_user (id)
+);