Refactor ICD11 Diagnosis fields in Consultation

[rithviknishad]

With reference to: ohcnetwork/care_fe#6144

Diagnosis can be of two types:

• Provisional
• Final

Any one of the final diagnoses can only be marked as "Principle" diagnosis.
If there are no final diagnosis, any one of the provisional diagnosis can be marked as "Principle" diagnosis instead.

The idea on how it is to be refactored was (before events module) to create a ConsultationDiagnosis model with fields:

• icd11_diagnosis (CharField or FK to ICD11 Record
• type ("provisional" or "final")
• is_principle (boolean)

[rithviknishad]

As discussed, a separate table is to be made, bulk_create upon consultation creation. Timestamp to be captured to align with events.