fix(gift): 수령확인 시각을 초 단위로 정규화한다

src/main/kotlin/kr/co/vividnext/sodalive/v2/gift/application/GiftCommandService.kt

@@ -18,6 +18,7 @@ import org.springframework.data.repository.findByIdOrNull
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
 import java.time.LocalDateTime
+import java.time.temporal.ChronoUnit
 
 data class GiftApplicationCommand(
     val recipientMemberId: Long,
@@ -297,7 +298,7 @@ class GiftCommandService(
             throw invalidRequest()
         }
         val delivery = deliveryRepository.findByGiftIdForUpdate(gift.id ?: throw invalidRequest()) ?: throw invalidRequest()
-        val deliveredAt = now()
+        val deliveredAt = now().truncatedTo(ChronoUnit.SECONDS)
 
         gift.status = GiftStatus.DELIVERED
         delivery.deliveredAt = deliveredAt

src/test/kotlin/kr/co/vividnext/sodalive/v2/api/admin/gift/adapter/in/web/AdminGiftControllerTest.kt

@@ -22,6 +22,7 @@ import kr.co.vividnext.sodalive.member.MemberAdapter
 import kr.co.vividnext.sodalive.member.MemberRepository
 import kr.co.vividnext.sodalive.member.MemberRole
 import kr.co.vividnext.sodalive.support.EmbeddedRedisInitializer
+import kr.co.vividnext.sodalive.v2.api.gift.dto.GiftDeliveryConfirmationResponse
 import kr.co.vividnext.sodalive.v2.gift.adapter.out.persistence.Gift
 import kr.co.vividnext.sodalive.v2.gift.adapter.out.persistence.GiftCategory
 import kr.co.vividnext.sodalive.v2.gift.adapter.out.persistence.GiftCategoryRepository
@@ -29,11 +30,13 @@ import kr.co.vividnext.sodalive.v2.gift.adapter.out.persistence.GiftDelivery
 import kr.co.vividnext.sodalive.v2.gift.adapter.out.persistence.GiftDeliveryRepository
 import kr.co.vividnext.sodalive.v2.gift.adapter.out.persistence.GiftRepository
 import kr.co.vividnext.sodalive.v2.gift.adapter.out.persistence.GiftReview
+import kr.co.vividnext.sodalive.v2.gift.adapter.out.persistence.GiftReviewRepository
 import kr.co.vividnext.sodalive.v2.gift.adapter.out.persistence.GiftSizePrice
 import kr.co.vividnext.sodalive.v2.gift.adapter.out.persistence.GiftSizePriceRepository
 import kr.co.vividnext.sodalive.v2.gift.adapter.out.scheduler.GiftScheduler
 import kr.co.vividnext.sodalive.v2.gift.application.GiftAdminService
 import kr.co.vividnext.sodalive.v2.gift.application.GiftApplicationCommand
+import kr.co.vividnext.sodalive.v2.gift.application.GiftApplicationNoGenerator
 import kr.co.vividnext.sodalive.v2.gift.application.GiftCommandService
 import kr.co.vividnext.sodalive.v2.gift.application.GiftPushService
 import kr.co.vividnext.sodalive.v2.gift.application.GiftRecipientAddressRegistrationCommand
@@ -55,6 +58,7 @@ import org.junit.jupiter.api.Test
 import org.junit.jupiter.params.ParameterizedTest
 import org.junit.jupiter.params.provider.EnumSource
 import org.junit.jupiter.params.provider.MethodSource
+import org.junit.jupiter.params.provider.ValueSource
 import org.mockito.Mockito
 import org.springframework.aop.framework.Advised
 import org.springframework.aop.support.AopUtils
@@ -121,6 +125,8 @@ class AdminGiftControllerTest @Autowired constructor(
     private val sizePriceRepository: GiftSizePriceRepository,
     private val giftRepository: GiftRepository,
     private val giftDeliveryRepository: GiftDeliveryRepository,
+    private val giftReviewRepository: GiftReviewRepository,
+    private val applicationNoGenerator: GiftApplicationNoGenerator,
     private val memberRepository: MemberRepository,
     private val chargeRepository: ChargeRepository,
     private val useCanRepository: UseCanRepository,
@@ -592,6 +598,53 @@ class AdminGiftControllerTest @Autowired constructor(
         println("P16_CONFIRM_HTTP status=200 success=true rejected=true repeated=false senderPush=1 recipientPush=0")
     }
 
+    @ParameterizedTest
+    @ValueSource(ints = [0, 123456789, 999999999])
+    @DisplayName("수령 확인 시각은 나노초 입력에도 초 단위 DB 저장값과 응답이 일치한다")
+    fun shouldPersistAndReturnSameSecondPrecisionDeliveryTime(nanos: Int) {
+        val (gift, _) = saveAdminGift(
+            applicationNo = APPLICATION_NO,
+            status = GiftStatus.INSPECTION_COMPLETED,
+            senderNickname = "precision-sender",
+            recipientNickname = "precision-recipient",
+            withTracking = true
+        )
+        val giftId = requireNotNull(gift.id)
+        val fixedNow = LocalDateTime.of(2026, 10, 22, 23, 59, 59, nanos)
+        val service = GiftCommandService(
+            giftRepository = giftRepository,
+            deliveryRepository = giftDeliveryRepository,
+            reviewRepository = giftReviewRepository,
+            categoryRepository = categoryRepository,
+            sizePriceRepository = sizePriceRepository,
+            memberRepository = memberRepository,
+            applicationNoGenerator = applicationNoGenerator,
+            canPaymentService = canPaymentService,
+            giftPushService = giftPushService,
+            now = { fixedNow }
+        )
+
+        val result = requireNotNull(
+            TransactionTemplate(transactionManager).execute {
+                val recipient = memberRepository.findById(gift.recipientMemberId).orElseThrow()
+                service.confirmDelivery(recipient, gift.applicationNo).also {
+                    entityManager.flush()
+                    entityManager.clear()
+                }
+            }
+        )
+        val persisted = requireNotNull(giftDeliveryRepository.findByGiftId(giftId)?.deliveredAt)
+        println(
+            "P16_CONFIRM_PRECISION nanos=$nanos input=$fixedNow returned=${result.deliveredAt} " +
+                "reloaded=$persisted expected=2026-10-22T23:59:59"
+        )
+        assertEquals(persisted, result.deliveredAt)
+        assertEquals(LocalDateTime.of(2026, 10, 22, 23, 59, 59), persisted)
+        assertEquals(0, persisted.nano)
+        assertEquals("2026-10-22T23:59:59Z", GiftDeliveryConfirmationResponse.from(result).deliveredAt)
+        assertEquals(GiftStatus.DELIVERED, giftRepository.findById(giftId).orElseThrow().status)
+    }
+
     @Test
     @DisplayName("실제 transactional 스케줄러 배송지 만료는 발신자만 한 번 알리고 재실행은 추가 알림을 보내지 않는다")
     fun shouldExpireRecipientAddressThroughTransactionalSchedulerAndNotifyOnlySenderOnce() {