dev add violation notion

src/main/java/ru/soune/nocopy/service/search/SearchImageService.java

@@ -141,17 +141,18 @@ public class SearchImageService {
             log.info("SearchAPI response code={}, duration={}ms, engine={}",
                     response.code(), duration, engine);
 
-            if (!response.isSuccessful()) {
-                String errorBody = response.body() != null ? response.body().string() : "null";
-                throw new IOException("API error " + response.code() + ": " + errorBody);
-            }
-
             ResponseBody body = response.body();
             if (body == null) {
                 throw new IOException("Empty response body");
             }
 
-            return body.string();
+            String responseBody = body.string();
+
+            if (!response.isSuccessful()) {
+                throw new IOException("API error " + response.code() + ": " + responseBody);
+            }
+
+            return responseBody;
         }
     }