feat: 컨슈머, 프로듀서에서 모두 쓰이는 Configuration 클래스

- 현재는 Dead Letter Topic 프로듀서 Bean만 등록

src/main/java/com/sangdol/consumer/infrastructure/kafka/common/CommonConfiguration.java

@@ -0,0 +1,18 @@
+package com.sangdol.consumer.infrastructure.kafka.common;
+
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import lombok.RequiredArgsConstructor;
+
+@Configuration
+@RequiredArgsConstructor
+@EnableConfigurationProperties(KafkaProperties.class)
+public class CommonConfiguration {
+
+	@Bean
+	public KafkaProperties.DeadLetterTopic deadLetterTopic(KafkaProperties kafkaProperties) {
+		return kafkaProperties.getDeadLetterTopic();
+	}
+}