[#68] ArgumentResolver에서의 불필요한 DB 요청 로직 제거 (#69)

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## 📝 관련 이슈 및 PR

**PR과 관련된 이슈 번호**
- #68

## ✨ 작업 내용
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- ArgumentResolver에서의 DB 조회 요청 제거

## 🧪 테스트
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- 성능 테스트 결과 Hikari Pending 커넥션의 최대 개수가 80 -> 5로 대폭 감소
- Tomcat 스레드도 기존은 최대 200개까지 활성화 되었으나, 개선 후 최대 80까지만 처리됨.
- P95 응답 시간 235 -> 141ms로 40% 개선

## 📚 참고 자료 및 기타
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Reviewed-on: #69
Co-authored-by: pricelees <priceelees@gmail.com>
Co-committed-by: pricelees <priceelees@gmail.com>

service/src/main/kotlin/com/sangdol/roomescape/auth/web/support/resolver/UserContextResolver.kt

@@ -6,7 +6,7 @@ import com.sangdol.roomescape.auth.exception.AuthException
 import com.sangdol.roomescape.auth.infrastructure.jwt.JwtUtils
 import com.sangdol.roomescape.auth.web.support.User
 import com.sangdol.roomescape.auth.web.support.accessToken
-import com.sangdol.roomescape.user.business.UserService
+import com.sangdol.roomescape.common.types.CurrentUserContext
 import io.github.oshai.kotlinlogging.KLogger
 import io.github.oshai.kotlinlogging.KotlinLogging
 import jakarta.servlet.http.HttpServletRequest
@@ -22,7 +22,6 @@ private val log: KLogger = KotlinLogging.logger {}
 @Component
 class UserContextResolver(
     private val jwtUtils: JwtUtils,
-    private val userService: UserService,
 ) : HandlerMethodArgumentResolver {
 
     override fun supportsParameter(parameter: MethodParameter): Boolean {
@@ -43,7 +42,7 @@ class UserContextResolver(
                 MdcPrincipalIdUtil.set(it)
             }.toLong()
 
-            return userService.findContextById(id)
+            return CurrentUserContext(id = id)
         } catch (e: Exception) {
             log.info { "[UserContextResolver] 회원 조회 실패. message=${e.message}" }
             throw AuthException(AuthErrorCode.MEMBER_NOT_FOUND)

service/src/main/kotlin/com/sangdol/roomescape/common/types/CurrentUserContext.kt

@@ -1,6 +1,5 @@
 package com.sangdol.roomescape.common.types
 
 data class CurrentUserContext(
-    val id: Long,
+    val id: Long
-    val name: String,
 )

service/src/main/kotlin/com/sangdol/roomescape/user/business/UserService.kt

@@ -1,7 +1,6 @@
 package com.sangdol.roomescape.user.business
 
 import com.sangdol.common.persistence.IDGenerator
-import com.sangdol.roomescape.common.types.CurrentUserContext
 import com.sangdol.roomescape.user.dto.UserContactResponse
 import com.sangdol.roomescape.user.dto.UserCreateRequest
 import com.sangdol.roomescape.user.dto.UserCreateResponse
@@ -28,17 +27,6 @@ class UserService(
     private val userValidator: UserValidator,
     private val idGenerator: IDGenerator
 ) {
-    @Transactional(readOnly = true)
-    fun findContextById(id: Long): CurrentUserContext {
-        log.info { "[findContextById] 현재 로그인된 회원 조회 시작: id=${id}" }
-        val user: UserEntity = findOrThrow(id)
-
-        return CurrentUserContext(user.id, user.name)
-            .also {
-                log.info { "[findContextById] 현재 로그인된 회원 조회 완료: id=${id}" }
-            }
-    }
-
     @Transactional(readOnly = true)
     fun findCredentialsByAccount(email: String): UserLoginCredentials {
         log.info { "[findCredentialsByAccount] 회원 조회 시작: email=${email}" }

service/src/test/kotlin/com/sangdol/roomescape/payment/PaymentAPITest.kt

@@ -43,16 +43,6 @@ class PaymentAPITest(
                         expectedErrorCode = AuthErrorCode.MEMBER_NOT_FOUND
                     )
                 }
-
-                test("관리자") {
-                    runExceptionTest(
-                        token = testAuthUtil.defaultHqAdminLogin().second,
-                        method = HttpMethod.POST,
-                        endpoint = endpoint,
-                        requestBody = PaymentFixture.cancelRequest,
-                        expectedErrorCode = AuthErrorCode.MEMBER_NOT_FOUND
-                    )
-                }
             }
 
             test("정상 취소") {

service/src/test/kotlin/com/sangdol/roomescape/reservation/ReservationApiTest.kt

@@ -49,15 +49,6 @@ class ReservationApiTest(
                         expectedErrorCode = AuthErrorCode.MEMBER_NOT_FOUND
                     )
                 }
-
-                test("관리자") {
-                    runExceptionTest(
-                        token = testAuthUtil.defaultHqAdminLogin().second,
-                        method = HttpMethod.POST,
-                        endpoint = endpoint,
-                        expectedErrorCode = AuthErrorCode.MEMBER_NOT_FOUND
-                    )
-                }
             }
 
 
@@ -185,15 +176,6 @@ class ReservationApiTest(
                         expectedErrorCode = AuthErrorCode.TOKEN_NOT_FOUND
                     )
                 }
-
-                test("관리자") {
-                    runExceptionTest(
-                        token = testAuthUtil.defaultHqAdminLogin().second,
-                        method = HttpMethod.POST,
-                        endpoint = endpoint,
-                        expectedErrorCode = AuthErrorCode.ACCESS_DENIED
-                    )
-                }
             }
 
             test("정상 응답") {
@@ -238,15 +220,6 @@ class ReservationApiTest(
                         expectedErrorCode = AuthErrorCode.TOKEN_NOT_FOUND
                     )
                 }
-
-                test("관리자") {
-                    runExceptionTest(
-                        token = testAuthUtil.defaultHqAdminLogin().second,
-                        method = HttpMethod.POST,
-                        endpoint = endpoint,
-                        expectedErrorCode = AuthErrorCode.ACCESS_DENIED
-                    )
-                }
             }
 
             test("정상 응답") {
@@ -315,15 +288,6 @@ class ReservationApiTest(
                         expectedErrorCode = AuthErrorCode.TOKEN_NOT_FOUND
                     )
                 }
-
-                test("관리자") {
-                    runExceptionTest(
-                        token = testAuthUtil.defaultHqAdminLogin().second,
-                        method = HttpMethod.POST,
-                        endpoint = endpoint,
-                        expectedErrorCode = AuthErrorCode.ACCESS_DENIED
-                    )
-                }
             }
 
             test("정상 응답") {
@@ -377,15 +341,6 @@ class ReservationApiTest(
                         expectedErrorCode = AuthErrorCode.TOKEN_NOT_FOUND
                     )
                 }
-
-                test("관리자") {
-                    runExceptionTest(
-                        token = testAuthUtil.defaultHqAdminLogin().second,
-                        method = HttpMethod.POST,
-                        endpoint = endpoint,
-                        expectedErrorCode = AuthErrorCode.ACCESS_DENIED
-                    )
-                }
             }
 
             context("정상 응답") {

service/src/test/kotlin/com/sangdol/roomescape/reservation/ReservationConcurrencyTest.kt

@@ -108,7 +108,7 @@ class ReservationConcurrencyTest(
 
     private fun createPendingReservation(user: UserEntity, schedule: ScheduleEntity): Long {
         return reservationService.createPendingReservation(
-            user = CurrentUserContext(id = user.id, name = user.name),
+            user = CurrentUserContext(id = user.id),
             request = PendingReservationCreateRequest(
                 scheduleId = schedule.id,
                 reserverName = user.name,

service/src/test/kotlin/com/sangdol/roomescape/user/UserApiTest.kt

@@ -148,15 +148,6 @@ class UserApiTest(
                         expectedErrorCode = AuthErrorCode.MEMBER_NOT_FOUND
                     )
                 }
-
-                test("관리자") {
-                    runExceptionTest(
-                        token = testAuthUtil.defaultStoreAdminLogin().second,
-                        method = HttpMethod.GET,
-                        endpoint = endpoint,
-                        expectedErrorCode = AuthErrorCode.MEMBER_NOT_FOUND
-                    )
-                }
             }
 
             test("정상 응답") {