feat(daemon): #335 분산 락 (ShedLock + Redis)

build.gradle:
- shedlock-spring 5.16.0
- shedlock-provider-redis-spring 5.16.0

TastebyApplication: @EnableSchedulerLock(defaultLockAtMostFor=PT15M)

ShedLockConfig 신규: RedisLockProvider Bean (in-cluster Redis 재사용)

DaemonScheduler.run:
- @SchedulerLock(name="daemon-runner", lockAtMostFor=PT15M, lockAtLeastFor=PT30S)
- 멀티 파드 환경(RollingUpdate 등)에서 한 인스턴스만 실행
- Redis 키: lock:daemon-runner

설계서: docs/design/335-daemon-distributed-lock/README.md (commit c88cb6a)

Refs: #335 (Developer 단계)

backend-java/build.gradle

@@ -28,6 +28,10 @@ dependencies {
     implementation 'org.springframework.boot:spring-boot-starter-data-redis'
     implementation 'org.springframework.boot:spring-boot-starter-validation'
 
+    // #335 — 분산 락 (RollingUpdate 시 멀티 파드 공존 중 데몬 중복 실행 차단)
+    implementation 'net.javacrumbs.shedlock:shedlock-spring:5.16.0'
+    implementation 'net.javacrumbs.shedlock:shedlock-provider-redis-spring:5.16.0'
+
     // Oracle JDBC + Security (Wallet support for Oracle ADB)
     implementation 'com.oracle.database.jdbc:ojdbc11:23.7.0.25.01'
     implementation 'com.oracle.database.security:oraclepki:23.7.0.25.01'