Updates to the Clinic Settings page:

1. Added Markdown support and a Markdown previewer in the Policies tab for formatting clinic policies.

Added a new configurable Oscar Appointment Status Code ("Appointment Status Reminder Email Sent") that can be used to change an appointment's status/colour in Oscar after Cortico sends a email reminder for that appointment to the patient. This field is optional.

Updates to the appointment booking page:

1. We now sort doctors who are available today by earliest available timeslot. (Note: this is not applicable to the First Available workflow because there is no doctor selection in that workflow.)

(Backend) Added the following unique constraints:

1. Specializations: clinic, workflow, and doctor must be unique together

2. Workflows: clinic and slug must be unique together

3. Doctors: clinic and provider number must be unique together