feat(dbt): dim_school.inspectorate and ofsted_listed (H4)

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

pipeline/transform/models/marts/dim_school.sql

@@ -1,9 +1,10 @@
 -- Mart: Canonical school dimension — one row per active URN
 
--- int_ofsted_latest is only ref()'d inside a conditional block below (it may not
--- exist before the Ofsted pipeline first runs), so declare the dependency
--- explicitly for dbt's DAG.
+-- int_ofsted_latest and int_ofsted_listed are only ref()'d inside conditional
+-- blocks below (they may not exist before the Ofsted pipeline first runs), so
+-- declare the dependencies explicitly for dbt's DAG.
 -- depends_on: {{ ref('int_ofsted_latest') }}
+-- depends_on: {{ ref('int_ofsted_listed') }}
 
 with schools as (
     select * from {{ ref('stg_gias_establishments') }}
@@ -15,6 +16,12 @@ with schools as (
     identifier='int_ofsted_latest'
 ) %}
 
+{% set listed_relation = adapter.get_relation(
+    database=target.database,
+    schema='intermediate',
+    identifier='int_ofsted_listed'
+) %}
+
 select
     s.urn,
     s.local_authority_code * 1000 + s.establishment_number as laestab,
@@ -70,6 +77,14 @@ select
     s.status_code,
     s.nursery_provision,
     s.admissions_policy_code,
+    -- The inspectorate GIAS names ("ISI" for most independent schools) and
+    -- whether Ofsted's own data lists the school, inspected or not (audit H4).
+    s.inspectorate_name as inspectorate,
+    {% if listed_relation is not none %}
+    l.urn is not null as ofsted_listed,
+    {% else %}
+    null::boolean as ofsted_listed,
+    {% endif %}
 
     -- Latest Ofsted (populated after monthly Ofsted pipeline runs). The grade
     -- still in force and the latest visit, from int_ofsted_latest — never a
@@ -88,6 +103,9 @@ from schools s
 {% if ofsted_relation is not none %}
 left join {{ ref('int_ofsted_latest') }} o on s.urn = o.urn
 {% endif %}
+{% if listed_relation is not none %}
+left join {{ ref('int_ofsted_listed') }} l on s.urn = l.urn
+{% endif %}
 -- 1 = Open; 3 = Open, but proposed to close (still operating; drops out when
 -- GIAS flips to Closed — marts fully rebuild each run).
 where s.status_code in (1, 3)