chore: remove the Ofsted Parent View feature end to end

Removes the 'What Parents Say' section and all supporting elements:

Frontend:
- Drop the OfstedParentView type, the parent_view field, the survey
  section and the 'X% would recommend' callouts in the primary and
  secondary detail views, the Parents nav item, and the parent-view CSS.

Backend:
- Remove the FactParentView model, its loading in data_loader, and
  parent_view from the school-details API response.
- Bump SCHEMA_VERSION to 6 and add an idempotent drop step
  (DROP TABLE IF EXISTS marts.fact_parent_view) to the CLI migration;
  add scripts/sql/drop_fact_parent_view.sql to apply directly to the
  dbt-owned marts DBs on staging and prod.

Pipeline:
- Delete the stg_parent_view + fact_parent_view dbt models and their
  source/schema entries, the tap-uk-parent-view Meltano extractor, and
  the monthly Parent View DAG; drop it from the Dockerfile and the
  staging bootstrap docs.

The rest of dbt (which builds every mart the app reads) is untouched.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

nextjs-app/components/SchoolDetailView.module.css

@@ -713,18 +713,6 @@
     margin: -0.5rem 0 1rem;
 }
 
-/* Response count badge */
-.responseBadge {
-    font-size: 0.75rem;
-    font-weight: 500;
-    font-family: var(--font-dm-sans), sans-serif;
-    color: var(--text-muted, #8a847a);
-    background: var(--bg-secondary, #f3ede4);
-    padding: 0.1rem 0.5rem;
-    border-radius: 999px;
-    margin-left: auto;
-}
-
 .subSectionTitle {
     font-size: 0.875rem;
     font-weight: 600;
@@ -732,18 +720,6 @@
     margin: 1.25rem 0 0.75rem;
 }
 
-/* Parent recommendation line in Ofsted section */
-.parentRecommendLine {
-    font-size: 0.85rem;
-    color: var(--text-secondary, #5c564d);
-    margin: 0.5rem 0 0;
-}
-
-.parentRecommendLine strong {
-    color: var(--accent-teal, #2d7d7d);
-    font-weight: 700;
-}
-
 /* Metrics Grid & Cards */
 .metricsGrid {
     display: grid;
@@ -1094,49 +1070,6 @@
     text-decoration: underline;
 }
 
-/* Parent View */
-.parentViewGrid {
-    display: flex;
-    flex-direction: column;
-    gap: 0.5rem;
-}
-
-.parentViewRow {
-    display: flex;
-    align-items: center;
-    gap: 0.75rem;
-    font-size: 0.875rem;
-}
-
-.parentViewLabel {
-    flex: 0 0 18rem;
-    color: var(--text-secondary, #5c564d);
-    font-size: 0.8125rem;
-}
-
-.parentViewBar {
-    flex: 1;
-    height: 0.5rem;
-    background: var(--bg-secondary, #f3ede4);
-    border-radius: 4px;
-    overflow: hidden;
-}
-
-.parentViewFill {
-    height: 100%;
-    background: var(--accent-teal, #2d7d7d);
-    border-radius: 4px;
-    transition: width 0.4s ease;
-}
-
-.parentViewPct {
-    flex: 0 0 2.75rem;
-    text-align: right;
-    font-size: 0.8125rem;
-    font-weight: 600;
-    color: var(--text-primary, #1a1612);
-}
-
 /* Admissions badge — uses unified status colours */
 .admissionsBadge {
     display: inline-flex;
@@ -1269,25 +1202,6 @@
 }
 
 @media (max-width: 480px) {
-    .parentViewRow {
-        flex-direction: column;
-        align-items: flex-start;
-        gap: 0.25rem;
-    }
-
-    .parentViewLabel {
-        flex: none;
-        max-width: 100%;
-    }
-
-    .parentViewBar {
-        width: 100%;
-    }
-
-    .parentViewPct {
-        flex: none;
-    }
-
     .card {
         padding: 1rem;
     }