feature: Content-Type charset 기반 인바운드/아웃바운드 인코딩 처리

.gitignore

@@ -235,3 +235,6 @@ gradle-app.setting
 # End of https://www.gitignore.io/api/java,macos,gradle,intellij
 /EAISIMWeb/
 /.apt_generated_tests/
+
+# Claude Code
+.claude/

src/main/java/com/eactive/eai/adapter/service/DJErpApiAdapterService.java

@@ -242,7 +242,17 @@ public class DJErpApiAdapterService extends HttpAdapterServiceSupport {
 		byte[] data = new byte[bb.position()];
 		bb.position(0);
 		bb.get(data);
-		paramValue = new String(data, encode);
+		String bodyEncode = encode;
+		String contentTypeHeader = request.getContentType();
+		if (StringUtils.isNotBlank(contentTypeHeader)) {
+		    try {
+			MediaType mediaType = MediaType.parseMediaType(contentTypeHeader);
+			if (mediaType.getCharset() != null) {
+			    bodyEncode = mediaType.getCharset().name();
+			}
+		    } catch (Exception ignored) {}
+		}
+		paramValue = new String(data, bodyEncode);
 
 		if (traceLevel >= 3) {
 		    HttpMemoryLogger.txlog(adptGrpName + adptName,

src/main/java/com/eactive/eai/custom/adapter/http/client/impl/HttpClient5AdapterServiceBypass.java

@@ -34,6 +34,7 @@ import org.json.simple.JSONArray;
 import org.json.simple.JSONObject;
 import org.json.simple.JSONValue;
 import org.springframework.http.HttpHeaders;
+import org.springframework.http.MediaType;
 import org.springframework.web.util.UriComponents;
 import org.springframework.web.util.UriComponentsBuilder;
 
@@ -315,8 +316,23 @@ public class HttpClient5AdapterServiceBypass extends HttpClient5AdapterServiceSu
 				HttpMemoryLogger.txlog(vo.getAdapterGroupName() + vo.getAdapterName(),
 						"RECV [Bypass Request..]" + CommonLib.getDumpMessage(responseMessage));
 			}
+			// 응답 Content-Type charset 기반 인코딩 결정, 없으면 어댑터 encoding 사용
+			String responseEncode = vo.getEncode();
+			if (responseHeaders != null) {
+				for (Header header : responseHeaders) {
+					if (StringUtils.equalsIgnoreCase(header.getName(), HttpHeaders.CONTENT_TYPE)) {
+						try {
+							MediaType mediaType = MediaType.parseMediaType(header.getValue());
+							if (mediaType.getCharset() != null) {
+								responseEncode = mediaType.getCharset().name();
+							}
+						} catch (Exception ignored) {}
+						break;
+					}
+				}
+			}
 			assignRelayDataToInbound(tempProp, responseHeaders, status);
-			return responseMessage;
+			return responseMessage != null ? new String(responseMessage, responseEncode) : "";
 		} catch (SocketTimeoutException ste) {
 			if (vo.getTraceLevel() >= 3) {
 				HttpMemoryLogger.error(vo.getAdapterGroupName() + vo.getAdapterName(),