In order to allow proper deletion of tasks, we no longer merge data returned from the front end, we set it directly as the task_data.
When returning data to the front end, we take any previous form submission and merge it into the current task data, allowing users to keep their previous submissions.
There is now an "extract_form_data" method that does it's best job to calculate what form data might have changed from the front end.
I noticed we were saving the workflow every time we loaded it up, rather than only when we were making changes to it. Refactored this to be a little more careful.
Centralized the saving of the workflow into one location in the processor, so we can make sure we update all the details about that workflow every time we save.
The workflow service has a method that will log any task action taken in a consistent way.
The stats models were removed from the API completely. Will wait for a use case for dealing with this later.