feat(be) : tour 캐시 스케줄러 개선

# Conflicts:
#	src/main/kotlin/com/back/koreaTravelGuide/KoreaTravelGuideApplication.kt

Author: YangHJ2415

src/main/kotlin/com/back/koreaTravelGuide/KoreaTravelGuideApplication.kt

@@ -5,9 +5,12 @@ import org.springframework.boot.autoconfigure.SpringBootApplication
 import org.springframework.boot.autoconfigure.data.redis.RedisRepositoriesAutoConfiguration
 import org.springframework.boot.runApplication
 import org.springframework.cache.annotation.EnableCaching
+import org.springframework.scheduling.annotation.EnableScheduling
 import org.springframework.data.jpa.repository.config.EnableJpaRepositories
 
 @EnableCaching
+@EnableScheduling
+@SpringBootApplication(scanBasePackages = ["com.back.koreaTravelGuide"])
 @EnableJpaRepositories(basePackages = ["com.back.koreaTravelGuide.domain"])
 @SpringBootApplication(
     scanBasePackages = ["com.back.koreaTravelGuide"],

src/main/kotlin/com/back/koreaTravelGuide/domain/ai/tour/cache/TourCacheConfig.kt

@@ -1,4 +1,20 @@
 package com.back.koreaTravelGuide.domain.ai.tour.cache
 
-// TODO: 관광 정보 캐시 설정 - 캐시 주기 및 정책 관리 (필요시 구현)
-class TourCacheConfig
+import com.back.koreaTravelGuide.common.logging.log
+import org.springframework.cache.annotation.CacheEvict
+import org.springframework.context.annotation.Configuration
+import org.springframework.scheduling.annotation.Scheduled
+
+@Configuration
+class TourCacheConfig {
+    companion object {
+        private val TOUR_CACHE_NAMES = arrayOf("tourAreaBased", "tourLocationBased", "tourDetail")
+    }
+
+    // 매일 자정(00:00)마다 모든 캐시 항목을 무효화
+    @CacheEvict(cacheNames = ["tourAreaBased", "tourLocationBased", "tourDetail"], allEntries = true)
+    @Scheduled(cron = "0 0 0 * * ?", zone = "Asia/Seoul")
+    fun clearTourCaches() {
+        log.info("clearTourCaches - evicting {}", TOUR_CACHE_NAMES.joinToString())
+    }
+}

src/main/kotlin/com/back/koreaTravelGuide/domain/ai/tour/service/core/TourAreaBasedServiceCore.kt

@@ -15,6 +15,7 @@ class TourAreaBasedServiceCore(
     @Cacheable(
         "tourAreaBased",
         key = "#tourParams.contentTypeId + '_' + #tourParams.areaCode + '_' + #tourParams.sigunguCode",
+        unless = "#result == null",
     )
     override fun fetchAreaBasedTours(tourParams: TourParams): TourResponse {
         if (

src/main/kotlin/com/back/koreaTravelGuide/domain/ai/tour/service/core/TourDetailServiceCore.kt

@@ -12,7 +12,7 @@ import org.springframework.stereotype.Service
 class TourDetailServiceCore(
     private val tourApiClient: TourApiClient,
 ) : TourDetailUseCase {
-    @Cacheable("tourDetail", key = "#detailParams.contentId")
+    @Cacheable("tourDetail", key = "#detailParams.contentId", unless = "#result == null")
     override fun fetchTourDetail(detailParams: TourDetailParams): TourDetailResponse {
         if (detailParams.contentId == "127974") {
             return PRESET_DETAIL_RESPONSE

src/main/kotlin/com/back/koreaTravelGuide/domain/ai/tour/service/core/TourLocationBasedServiceCore.kt

@@ -18,6 +18,7 @@ class TourLocationBasedServiceCore(
         key =
             "#tourParams.contentTypeId + '_' + #tourParams.areaCode + '_' + #tourParams.sigunguCode + " +
                 "'_' + #locationParams.mapX + '_' + #locationParams.mapY + '_' + #locationParams.radius",
+        unless = "#result == null",
     )
     override fun fetchLocationBasedTours(
         tourParams: TourParams,