Add multiple care team members to a child in one request.

Each member is processed independently - successful entries are persisted even when others fail (partial failure). Returns per-member results so the client can surface inline errors and allow retrying only failed entries.

For each successfully added member:

• Email is checked against clinician_profiles (Branch A = match, Branch B = no match)
• Branch A results include clinician_name and clinic_name

When send_inbox_emails=True, dispatches inbox sharing emails to selected (or all) successfully added members.

Authentication: JWT required RLS: User must have family access to the child