AI 서비스 Kafka/Redis 통합 테스트 및 설정 개선

- Gradle 빌드 캐시 파일 제외 (.gitignore 업데이트)
- Kafka 통합 테스트 구현 (AIJobConsumerIntegrationTest)
- 단위 테스트 추가 (Controller, Service 레이어)
- IntelliJ 실행 프로파일 자동 생성 도구 추가
- Kafka 테스트 배치 스크립트 추가
- Redis 캐시 설정 개선

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

ai-service/src/test/resources/application-test.yml

@@ -0,0 +1,69 @@
+spring:
+  application:
+    name: ai-service-test
+
+  # Redis Configuration (테스트용)
+  data:
+    redis:
+      host: ${REDIS_HOST:20.214.210.71}
+      port: ${REDIS_PORT:6379}
+      password: ${REDIS_PASSWORD:Hi5Jessica!}
+      database: ${REDIS_DATABASE:3}
+      timeout: 3000
+
+  # Kafka Configuration (테스트용)
+  kafka:
+    bootstrap-servers: ${KAFKA_BOOTSTRAP_SERVERS:20.249.182.13:9095,4.217.131.59:9095}
+    consumer:
+      group-id: ai-service-test-consumers
+      auto-offset-reset: earliest
+      enable-auto-commit: false
+      key-deserializer: org.apache.kafka.common.serialization.StringDeserializer
+      value-deserializer: org.springframework.kafka.support.serializer.JsonDeserializer
+      properties:
+        spring.json.trusted.packages: "*"
+    listener:
+      ack-mode: manual
+
+# Server Configuration
+server:
+  port: 0  # 랜덤 포트 사용
+
+# JWT Configuration (테스트용)
+jwt:
+  secret: test-jwt-secret-key-for-testing-only
+  access-token-validity: 1800
+  refresh-token-validity: 86400
+
+# Kafka Topics
+kafka:
+  topics:
+    ai-job: ai-event-generation-job
+    ai-job-dlq: ai-event-generation-job-dlq
+
+# AI API Configuration (테스트용 - Mock 사용)
+ai:
+  provider: CLAUDE
+  claude:
+    api-url: ${CLAUDE_API_URL:https://api.anthropic.com/v1/messages}
+    api-key: ${CLAUDE_API_KEY:test-key}
+    anthropic-version: 2023-06-01
+    model: claude-3-5-sonnet-20241022
+    max-tokens: 4096
+    temperature: 0.7
+    timeout: 300000
+
+# Cache TTL
+cache:
+  ttl:
+    recommendation: 86400
+    job-status: 86400
+    trend: 3600
+    fallback: 604800
+
+# Logging
+logging:
+  level:
+    root: INFO
+    com.kt.ai: DEBUG
+    org.springframework.kafka: DEBUG