fix(compare): expert sign-off must-fixes — phase-matched admissions, Ofsted sentinel codes, selective-school copy

M1: admissions rounds are now selected by the active phase tab
(admissionsForPhase) — an all-through school's Year 7 round no longer
masquerades as Reception odds beside pure primaries; honest per-cell and
section fallbacks name the round (Reception / Year 7).
M2: Ofsted sentinel codes (9 = not applicable) never render as judgement
chips, and the sixth-form judgement — previously dropped — now renders
for schools that have one.
M3: 'What this means' is phase- and type-aware: selective schools get
entrance-test framing, secondary faith schools a faith-criteria note, and
the primaries' distance template never appears on the secondary tab
(admissions_policy now exposed in compare school_info).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0146VHeLAWjDVE2B5uU67jCB

nextjs-app/__tests__/components/CompareOfsted.test.tsx

@@ -96,6 +96,31 @@ describe('CompareOfsted', () => {
     expect(links[0]).toHaveAttribute('href', 'https://reports.ofsted.gov.uk/provider/21/1');
   });
 
+  it('never renders Ofsted sentinel codes (9 = not applicable) as judgement chips', () => {
+    const sentinelSchool = school(6, 'Sentinel School');
+    const sentinelData: Record<string, ComparisonData> = {
+      '6': {
+        school_info: sentinelSchool,
+        yearly_data: [],
+        ofsted: ofsted({
+          overall_effectiveness: 2,
+          grade_source: 'graded',
+          quality_of_education: 1,
+          early_years_provision: 9,
+          sixth_form_provision: 2,
+        }),
+      },
+    };
+    render(<CompareOfsted schools={[sentinelSchool]} data={sentinelData} />);
+    // Real grades render…
+    expect(screen.getByText('Quality of education')).toBeInTheDocument();
+    // …the applicable sixth-form judgement renders (was previously dropped)…
+    expect(screen.getByText('Sixth form provision')).toBeInTheDocument();
+    // …and the not-applicable sentinel never appears, neither as area nor code.
+    expect(screen.queryByText('Early years provision')).toBeNull();
+    expect(screen.queryByText('9')).toBeNull();
+  });
+
   it('dates a report card with the report-card inspection date, never the legacy date', () => {
     const cardSchool = school(4, 'Dated Card School');
     const cardData: Record<string, ComparisonData> = {