feat(detail): surface GIAS identity/contact details, drop unwired sections

Add seven school-identity fields to the detail header (both primary and
secondary views): age range, religious character, nursery and sixth-form
indicators as chips; telephone (tel: link), county and parliamentary
constituency as header details. religious_denomination, age_range and
has_sixth_form were already served; telephone, nursery_provision, county
and parliamentary_constituency are newly wired through the marts query
(with a NULL fallback for un-rebuilt marts, mirroring has_sixth_form) and
the school_info API response.

Remove three UI sections the backend never populated (always null): Year 1
Phonics, the SEN "types of additional needs" breakdown, and the average
class-size card — along with their now-dead props, route plumbing, and the
SenDetail/Phonics types + class_size_avg field.

Extend the e2e detail journey to assert the Phonics section is gone and the
new header fields render when the record carries them.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

nextjs-app/app/school/[slug]/page.tsx

@@ -133,7 +133,7 @@ export default async function SchoolPage({ params }: SchoolPageProps) {
     notFound();
   }
 
-  const { school_info, yearly_data, absence_data, ofsted, census, admissions, admissions_history, sen_detail, phonics, deprivation, finance } = data;
+  const { school_info, yearly_data, absence_data, ofsted, census, admissions, admissions_history, deprivation, finance } = data;
 
   // Redirect bare URN to canonical slug URL
   const canonicalSlug = schoolUrl(urn, school_info.school_name).replace('/school/', '');
@@ -191,8 +191,6 @@ export default async function SchoolPage({ params }: SchoolPageProps) {
           ofsted={ofsted ?? null}
           census={census ?? null}
           admissions={admissions ?? null}
-          senDetail={sen_detail ?? null}
-          phonics={phonics ?? null}
           deprivation={deprivation ?? null}
           finance={finance ?? null}
         />
@@ -205,8 +203,6 @@ export default async function SchoolPage({ params }: SchoolPageProps) {
           census={census ?? null}
           admissions={admissions ?? null}
           admissionsHistory={admissions_history ?? []}
-          senDetail={sen_detail ?? null}
-          phonics={phonics ?? null}
           deprivation={deprivation ?? null}
           finance={finance ?? null}
         />