Log a message when everything went well as well

Closes #287 (closed)

arkindex_worker/worker/__init__.py

@@ -230,12 +230,13 @@ class ElementsWorker(
                     with contextlib.suppress(Exception):
                         self.update_activity(element.id, ActivityState.Error)
 
+        message = f'Ran on {count} element{"s"[:count>1]}: {count - failed} completed, {failed} failed'
         if failed:
-            logger.error(
-                f"Ran on {count} elements: {count - failed} completed, {failed} failed"
-            )
+            logger.error(message)
             if failed >= count:  # Everything failed!
                 sys.exit(1)
+        else:
+            logger.info(message)
 
     def process_element(self, element: Element | CachedElement):
         """
@@ -505,9 +506,10 @@ class DatasetWorker(BaseWorker, DatasetMixin, TaskMixin):
                 if dataset_artifact:
                     dataset_artifact.unlink(missing_ok=True)
 
+        message = f'Ran on {count} dataset{"s"[:count>1]}: {count - failed} completed, {failed} failed'
         if failed:
-            logger.error(
-                f"Ran on {count} datasets: {count - failed} completed, {failed} failed"
-            )
+            logger.error(message)
             if failed >= count:  # Everything failed!
                 sys.exit(1)
+        else:
+            logger.info(message)