[YS-65] feat: 테스트용 토큰 강제 발급 API & AccessToken 갱신 API 구현

src/main/kotlin/com/dobby/backend/domain/usecase/GetMemberById.kt

@@ -0,0 +1,16 @@
+package com.dobby.backend.domain.usecase
+
+import com.dobby.backend.domain.gateway.MemberGateway
+import com.dobby.backend.domain.model.Member
+
+class GetMemberById(
+    private val memberGateway: MemberGateway,
+) : UseCase<GetMemberById.Input, Member> {
+    data class Input(
+        val memberId: Long,
+    )
+
+    override fun execute(input: Input): Member {
+        return memberGateway.getById(input.memberId)
+    }
+}

src/main/kotlin/com/dobby/backend/presentation/api/dto/response/MemberResponse.kt

@@ -0,0 +1,36 @@
+package com.dobby.backend.presentation.api.dto.response
+
+import com.dobby.backend.domain.model.Member
+import com.dobby.backend.infrastructure.database.entity.enum.RoleType
+import io.swagger.v3.oas.annotations.media.Schema
+
+@Schema(description = "사용자 DTO")
+data class MemberResponse(
+    @Schema(description = "사용자 ID", example = "1")
+    val id: Long,
+
+    @Schema(description = "OAuth 이메일", example = "dlawotn3@naver.com")
+    val oauthEmail: String,
+
+    @Schema(description = "연락 이메일", example = "dlawotn3@naver.com")
+    val contactEmail: String,
+
+    @Schema(description = "역할", example = "USER")
+    val role: RoleType,
+
+    @Schema(description = "이름", example = "야뿌")
+    val name: String,
+) {
+
+    companion object {
+        fun fromDomain(member: Member): MemberResponse = with(member) {
+            MemberResponse(
+                id = memberId,
+                oauthEmail = oauthEmail,
+                contactEmail = contactEmail,
+                role = role,
+                name = name
+            )
+        }
+    }
+}

src/main/kotlin/com/dobby/backend/presentation/api/dto/response/MemberSignInResponse.kt

@@ -10,6 +10,7 @@ data class MemberSignInResponse(
     @Schema(description = "리프레쉬 토큰")
     val refreshToken: String,
 
-    @Schema(description = "사용자 Id")
-    val memberId: Long
-)
+    @Schema(description = "사용자 정보")
+    val member: MemberResponse,
+) {
+}