Registration situation

[EdoStorm96]

So as off the new attachments system, we want to check if a study measures using video or audio recording. Right now we can only check this clearly for observations and tasks ... the measurement field for interventions is just a text field. However that is not the only problem/annoyance: Both observations and tasks make use of a registration model, to provide options for picking the measurement method. However, these are separate models with the same name. Even though, their attributes basically fully overlap:

The options are loaded as migrations (registrations.json and 00_registrations.json) and although there is a minor difference between the options, there should just be one registration model, covering for both these cases. We can then select the choices manually for different study types, if so desired.

I would prefer though, to have a question of registration method, for each study, regardless of study type, possibly on a seperate page. That would increase uniformity, and allow for more possibilities + checking if a study features audio or video recording would become way more efficient.