feat(data): integrate 9 UK government data sources via Kestra

Adds a full data integration pipeline for enriching school profiles with
supplementary data from Ofsted, GIAS, EES, IDACI, and FBIT.

Backend:
- Bump SCHEMA_VERSION to 3; add 8 new DB tables (ofsted_inspections,
  ofsted_parent_view, school_census, admissions, sen_detail, phonics,
  school_deprivation, school_finance) plus GIAS columns on schools
- Expose all supplementary data via GET /api/schools/{urn}
- Enrich school list responses with ofsted_grade + ofsted_date

Integrator (new service):
- FastAPI HTTP microservice; Kestra calls POST /run/{source}
- 9 source modules: ofsted, gias, parent_view, census, admissions,
  sen_detail, phonics, idaci, finance
- 9 Kestra flow YAMLs with scheduled triggers and 3× retry

Frontend:
- SchoolRow: colour-coded Ofsted badge (Outstanding/Good/RI/Inadequate)
- SchoolDetailView: 7 new sections — Ofsted sub-judgements, Parent View
  survey bars, Admissions, Pupils & Inclusion / SEN, Phonics, Deprivation
  Context, Finances
- types.ts: 8 new interfaces + extended School/SchoolDetailsResponse

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

nextjs-app/components/SchoolRow.module.css

@@ -211,6 +211,23 @@
   color: var(--text-primary, #1a1612);
 }
 
+/* ── Ofsted badge ────────────────────────────────────── */
+.ofstedBadge {
+  display: inline-block;
+  padding: 0.0625rem 0.375rem;
+  font-size: 0.6875rem;
+  font-weight: 600;
+  border-radius: 3px;
+  white-space: nowrap;
+  flex-shrink: 0;
+  line-height: 1.4;
+}
+
+.ofsted1 { background: rgba(45, 125, 125, 0.12); color: var(--accent-teal, #2d7d7d); }
+.ofsted2 { background: rgba(60, 140, 60, 0.12); color: #3c8c3c; }
+.ofsted3 { background: rgba(201, 162, 39, 0.15); color: #b8920e; }
+.ofsted4 { background: rgba(224, 114, 86, 0.15); color: var(--accent-coral, #e07256); }
+
 /* ── Mobile ──────────────────────────────────────────── */
 @media (max-width: 640px) {
   .row {