refactor(admissions): rename published_admission_number to places_offered

The staging model aliased EES's total_number_places_offered column as
published_admission_number, but PAN is the school's published capacity
(not exposed by EES at school level) — what we actually have is the
count of places offered in a given admissions round. The misnomer
propagated to the mart, SQLAlchemy model, API response, TS types, and
UI copy ("places per year", "(PAN)").

Rename end-to-end and fix the UI labels:
  - "29 places for 42 first-choice applications"
      → "29 places offered for 42 first-choice applications"
  - "Reception/Year 7 places per year"
      → "Reception/Year 7 places offered"
  - drop the misleading "(PAN)" suffix in the secondary view

Also add a comment in stg_ees_admissions clarifying this is the number
of places offered, not PAN. Requires dbt to rebuild fact_admissions
(marts are materialized as tables) before the backend can start.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

nextjs-app/components/SchoolDetailView.tsx

@@ -787,15 +787,15 @@ export function SchoolDetailView({
       {admissions && (
         <section id="admissions" className={styles.card}>
           <h2 className={styles.sectionTitle}>How Hard to Get Into This School ({formatAcademicYear(admissions.year)})</h2>
-          {admissions.first_preference_applications != null && admissions.published_admission_number != null && (
+          {admissions.first_preference_applications != null && admissions.places_offered != null && (
             <div className={styles.admissionsBarWrap}>
               <div className={styles.admissionsBarLabel}>
-                <strong>{admissions.published_admission_number}</strong> places for <strong>{admissions.first_preference_applications}</strong> first-choice applications
+                <strong>{admissions.places_offered}</strong> places offered for <strong>{admissions.first_preference_applications}</strong> first-choice applications
               </div>
               <div className={styles.admissionsBarTrack}>
                 <div
                   className={`${styles.admissionsBarFill} ${admissions.oversubscribed ? styles.admissionsBarOversubscribed : styles.admissionsBarUndersubscribed}`}
-                  style={{ width: `${Math.min(100, (admissions.published_admission_number / admissions.first_preference_applications) * 100)}%` }}
+                  style={{ width: `${Math.min(100, (admissions.places_offered / admissions.first_preference_applications) * 100)}%` }}
                 />
               </div>
             </div>
@@ -808,10 +808,10 @@ export function SchoolDetailView({
             </div>
           )}
           <div className={styles.metricsGrid}>
-            {admissions.published_admission_number != null && (
+            {admissions.places_offered != null && (
               <div className={styles.metricCard}>
-                <div className={styles.metricLabel}>{isSecondary ? 'Year 7' : 'Reception'} places per year</div>
-                <div className={styles.metricValue}>{admissions.published_admission_number}</div>
+                <div className={styles.metricLabel}>{isSecondary ? 'Year 7' : 'Reception'} places offered</div>
+                <div className={styles.metricValue}>{admissions.places_offered}</div>
               </div>
             )}
             {admissions.total_applications != null && (

nextjs-app/components/SecondarySchoolDetailView.tsx

@@ -641,10 +641,10 @@ export function SecondarySchoolDetailView({
           )}
 
           <div className={styles.metricsGrid}>
-            {admissions.published_admission_number != null && (
+            {admissions.places_offered != null && (
               <div className={styles.metricCard}>
-                <div className={styles.metricLabel}>Year 7 places per year (PAN)</div>
-                <div className={styles.metricValue}>{admissions.published_admission_number}</div>
+                <div className={styles.metricLabel}>Year 7 places offered</div>
+                <div className={styles.metricValue}>{admissions.places_offered}</div>
               </div>
             )}
             {admissions.total_applications != null && (

nextjs-app/lib/types.ts

@@ -131,7 +131,8 @@ export interface SchoolCensus {
 export interface SchoolAdmissions {
   year: number;
   school_phase?: string | null;
-  published_admission_number: number | null;
+  /** Number of places the school offered in this admissions round (not PAN — EES doesn't expose PAN). */
+  places_offered: number | null;
   total_applications: number | null;
   first_preference_applications?: number | null;
   first_preference_offers?: number | null;