feat: implement web database downloader

- 웹 데이터베이스 다운로드를 위한 컴포넌트 구현

see-realview/src/main/java/com/see/realview/_core/config/WebClientConfig.java

@@ -71,4 +71,13 @@ public WebClient imageWebClient() {
             throw new ServerException(ExceptionStatus.IMAGE_PARSING_ERROR);
         }
     }
+
+    @Bean(name = "databaseWebClient")
+    public WebClient databaseWebClient() {
+        return WebClient.builder()
+                .exchangeStrategies(ExchangeStrategies.builder()
+                        .codecs(clientCodecConfigurer -> clientCodecConfigurer.defaultCodecs().maxInMemorySize(100 * 1024 * 1024))
+                        .build())
+                .build();
+    }
 }

see-realview/src/main/java/com/see/realview/_core/utils/WebDatabaseReader.java

@@ -0,0 +1,41 @@
+package com.see.realview._core.utils;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.stereotype.Component;
+import org.springframework.web.reactive.function.client.WebClient;
+import reactor.core.publisher.Mono;
+
+import java.util.Arrays;
+import java.util.List;
+
+@Component
+@Slf4j
+public class WebDatabaseReader {
+
+    private final WebClient databaseWebClient;
+
+    public WebDatabaseReader(@Autowired @Qualifier("databaseWebClient") WebClient databaseWebClient) {
+        this.databaseWebClient = databaseWebClient;
+    }
+
+    public List<String> read(String url, String identifier) {
+        log.debug("웹 데이터베이스 다운로드 시작 | " + url);
+        Mono<byte[]> readBytes = databaseWebClient
+                .get()
+                .uri(url)
+                .retrieve()
+                .bodyToMono(byte[].class);
+
+        byte[] dataBytes = readBytes.block();
+        if (dataBytes == null) {
+            log.debug("웹 데이터베이스 다운로드 실패 | " + url);
+            return List.of();
+        }
+
+        log.debug("웹 데이터베이스 다운로드 완료 | " + url);
+        String data = Arrays.toString(dataBytes);
+        return List.of(data.split(identifier));
+    }
+}