feat(dbt): further education status where a school has no school record (H4)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

pipeline/transform/tests/assert_ofsted_fe_never_overrides_school.sql

@@ -0,0 +1,7 @@
+-- A school-framework record always wins over a further education one for the
+-- same URN (audit H4): no FE row may stand where Ofsted's school MI has one.
+
+select f.urn
+from {{ ref('fact_ofsted_latest') }} f
+join {{ ref('stg_ofsted_inspections') }} s on s.urn = f.urn
+where f.framework = 'Further education and skills'