refactor: 인증 API 로깅 추가

src/main/kotlin/roomescape/auth/docs/AuthAPI.kt

@@ -11,6 +11,7 @@ import org.springframework.web.bind.annotation.RequestBody
 import roomescape.auth.web.LoginCheckResponse
 import roomescape.auth.web.LoginRequest
 import roomescape.auth.web.LoginResponse
+import roomescape.auth.web.support.LoginRequired
 import roomescape.auth.web.support.MemberId
 import roomescape.common.dto.response.CommonApiResponse
 
@@ -36,6 +37,7 @@ interface AuthAPI {
         @MemberId @Parameter(hidden = true) memberId: Long
     ): ResponseEntity<CommonApiResponse<LoginCheckResponse>>
 
+    @LoginRequired
     @Operation(summary = "로그아웃", tags = ["로그인이 필요한 API"])
     @ApiResponses(
         ApiResponse(responseCode = "200", description = "로그아웃 성공시 쿠키에 저장된 토큰 정보를 삭제합니다."),

src/main/kotlin/roomescape/auth/service/AuthService.kt

@@ -9,6 +9,7 @@ import roomescape.auth.infrastructure.jwt.JwtHandler
 import roomescape.auth.web.LoginCheckResponse
 import roomescape.auth.web.LoginRequest
 import roomescape.auth.web.LoginResponse
+import roomescape.common.exception.RoomescapeException
 import roomescape.member.business.MemberService
 import roomescape.member.infrastructure.persistence.MemberEntity
 
@@ -17,40 +18,50 @@ private val log: KLogger = KotlinLogging.logger {}
 @Service
 class AuthService(
     private val memberService: MemberService,
-    private val jwtHandler: JwtHandler
+    private val jwtHandler: JwtHandler,
 ) {
     fun login(request: LoginRequest): LoginResponse {
-        val member: MemberEntity = fetchMemberOrThrow(AuthErrorCode.LOGIN_FAILED) {
+        log.debug { "[AuthService.login] 로그인 시작: email=${request.email}" }
+        val params = "email=${request.email}, password=${request.password}"
+
+        val member: MemberEntity = fetchMemberOrThrow(AuthErrorCode.LOGIN_FAILED, params, "login") {
             memberService.findByEmailAndPassword(request.email, request.password)
         }
 
         val accessToken: String = jwtHandler.createToken(member.id!!)
-
         return LoginResponse(accessToken)
+            .also { log.info { "[AuthService.login] 로그인 완료: memberId=${member.id}" } }
     }
 
     fun checkLogin(memberId: Long): LoginCheckResponse {
-        val member: MemberEntity = fetchMemberOrThrow(AuthErrorCode.UNIDENTIFIABLE_MEMBER) {
+        log.debug { "[AuthService.checkLogin] 로그인 확인 시작: memberId=$memberId" }
+        val member: MemberEntity =
+            fetchMemberOrThrow(AuthErrorCode.UNIDENTIFIABLE_MEMBER, "memberId=$memberId", "checkLogin") {
                 memberService.findById(memberId)
             }
 
         return LoginCheckResponse(member.name, member.role.name)
+            .also { log.info { "[AuthService.checkLogin] 로그인 확인 완료: memberId=$memberId" } }
+    }
+
+    fun logout(memberId: Long) {
+        log.info { "[AuthService.logout] 로그아웃: memberId=$memberId" }
     }
 
     private fun fetchMemberOrThrow(
         errorCode: AuthErrorCode,
-        block: () -> MemberEntity
+        params: String,
+        calledBy: String,
+        block: () -> MemberEntity,
     ): MemberEntity {
         try {
+            log.debug { "[AuthService.$calledBy] 회원 조회 시작: $params" }
             return block()
-        } catch (_: Exception) {
+        } catch (e: Exception) {
+            if (e !is RoomescapeException) {
+                log.warn(e) { "[AuthService.$calledBy] 회원 조회 실패: $params" }
+            }
             throw AuthException(errorCode)
         }
     }
-
-    fun logout(memberId: Long?) {
-        if (memberId != null) {
-            log.info { "requested logout for $memberId" }
-        }
-    }
 }