counter cache for user model

rake/blob_file.rake

@@ -70,6 +70,9 @@ namespace :blob_file do
               puts "error saving blob file #{sha256_hex}: #{e}"
             end
           end
+      rescue => e
+        puts "error migrating blob entry: #{missing_sha256s.map { |sha256| HexUtil.bin2hex(sha256) }}"
+        raise e
       end
       num_migrated
     end