DEV: save missing s3 uploads count in redis

lib/s3_inventory.rb

@@ -58,6 +58,8 @@ class S3Inventory
           missing_uploads = uploads.joins("LEFT JOIN #{table_name} ON #{table_name}.etag = #{model.table_name}.etag").where("#{table_name}.etag is NULL")
 
           if (missing_count = missing_uploads.count) > 0
+            $redis.set("missing_s3_#{model.table_name}", missing_count)
+
             missing_uploads.select(:id, :url).find_each do |upload|
               log upload.url
             end

spec/components/s3_inventory_spec.rb

@@ -75,6 +75,7 @@ describe "S3Inventory" do
     end
 
     expect(output).to eq("#{upload.url}\n1 of 4 uploads are missing\n")
+    expect($redis.get("missing_s3_uploads")).to eq("1")
   end
 
   it "should backfill etags to uploads table correctly" do