Adds documentation for update_patient transition.

[dianabarsan]

medic/cht-core#6286

[SCdF]

One minor change / clearup, but nothing that would stop you from merging!

[SCdF]

Suggested change

	Updates a `data_record` to set its patient to its sender, the resulting doc will have `fields.patient_uuid` and `fields.patient_id` filled with the sender's information. Provides hydrated patient information to subsequent transitions.
	Updates a `data_record` to set its patient to its sender. The resulting doc will have `fields.patient_uuid` and `fields.patient_id` filled with the sender's information. Provides hydrated patient information to subsequent transitions.

You somewhat explain it the next paragraph, but consider explicitly stating that "sender" is the person who is attached to the phone number the original SMS was sent from.

[abbyad]

The transition name update_patient could lead to confusion since we've had requests to update the patient doc via SMS reports. Can we add some reference to self reporting, eg self_report? I think that will be clearer from a configurer (app developer) perspective.

[dianabarsan]

@abbyad I like self_report! Thanks for the suggestion!

[SCdF]

Looks good! One slight re-wording to consider, but it could really just be in my head

[SCdF]

Consider:

Suggested change

	If a doc already contains a `patient` field, does not have a sender or does not have a configured `form` field, it will be ignored by this transition.
	If a doc already contains a `patient` field, does not have a sender or whose `form` is not configured to be enabled for this transition, it will be ignored.

When I read my first thought was that you meant a form field that is any configured form (like for the entire application).