1. /organizations/api/organizations/ 500 — OrganizationSerializer referenced
non-existent fields (website, license_number, logo). Removed, added
preferred_language. Now returns 200 with correct data.
2. /journeys/api/stage-templates/ 500 — DRF auto-filter (DjangoFilterBackend)
tried to create filters for serializer computed fields (survey_template_name).
Added filter_backends=[] to disable auto-generation. Now returns 200.
3. /journeys/api/stage-instances/ 500 — same DRF filter issue + stale
select_related referencing non-existent FKs (physician, survey_instance).
Added filter_backends=[] + explicit select_related on valid FKs.
NOTE: still crashes the dev server (segfault during DRF request chain).
The queryset evaluates correctly in Python but the HTTP server dies.
This is a minor read-only API endpoint; the journey UI pages all work.
Needs further investigation of the DRF request middleware chain.
