use msave for log page saving

Author: lakshith-403

app/server/labml_app/analyses/logs.py

@@ -131,5 +131,4 @@ def update_logs_bulk(self, content: str):
             else:
                 page.update_logs(line)
 
-        for page in loaded_pages:
-            page.save()
+        LogPageModel.msave(loaded_pages)