What do the various `source` types represent on reports

[michael]

@diana

When the report is submitted from the Task tab, the value is changed to task by the configuration code generated by medic-conf here:

var content = {
  source: 'task',
  contact: c.contact,
};

Do you think it would be reasonable to have the source changed to task-group (or something like that) if the report was submitted from the Household Tasks screen?