OZG-6944 change log level of NotFoundException

vorgang-manager-server/src/main/java/de/ozgcloud/vorgang/common/errorhandling/ExceptionHandler.java

@@ -49,7 +49,7 @@ public class ExceptionHandler {
 
 	@GrpcExceptionHandler
 	public StatusException handleNotFoundException(NotFoundException e) {
-		LOG.error(ERROR_MESSAGE, e);
+		LOG.warn(ERROR_MESSAGE, e);
 		return createStatusException(buildNotFoundStatus(e), buildMetadata(e));
 	}
 
@@ -112,7 +112,7 @@ public class ExceptionHandler {
 	public StatusException handleNotFoundException(de.ozgcloud.apilib.common.errorhandling.NotFoundException e) {
 		var exceptionId = createExceptionId();
 		var messageWithExceptionId = ExceptionUtil.formatMessageWithExceptionId(e.getMessage(), exceptionId);
-		LOG.error("Grpc internal server error: {}", messageWithExceptionId, e);
+		LOG.warn("Grpc internal server error: {}", messageWithExceptionId, e);
 
 		var status = Status.NOT_FOUND.withDescription(messageWithExceptionId).withCause(e.getCause());
 		return createStatusException(status, buildMetadata(exceptionId));