docs: plan for inspection status beyond Ofsted's school data (H4)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/superpowers/specs/2026-10-06-inspection-status-beyond-ofsted-schools-design.md

@@ -227,3 +227,23 @@ E2E.
   provider's result; the URN match is always tried first.
 - **"Not yet inspected" disappears briefly** if PR 2 is promoted before the
   DAGs run (fallback query). It never appears wrongly.
+
+## Amendments (implementation plan, 2026-10-13)
+
+- **UKPRN comes from a new view, `stg_gias_ukprn`,** on the raw GIAS source,
+  not from a `ukprn` column on `stg_gias_establishments`. A `ref` to
+  `stg_gias_establishments` from the Ofsted models would put them in the daily
+  build's `stg_gias_establishments+` selection, where their Ofsted parents are
+  not built (`pipeline/tests/test_dag_selectors.py`). The daily build selects
+  `stg_gias_ukprn` by name; `stg_gias_establishments` gains only
+  `inspectorate_name`.
+- **A report card is recognised by `rc_inspection_date` as well as by its area
+  labels** (`hasReportCard`), on the school page and in compare. An FE report
+  card carries a safeguarding result and no school areas, so the label test
+  alone read it as "No overall grade".
+- **The compare page's Ofsted link is fixed.** `ofsted_page_url` built
+  `https://reports.ofsted.gov.uk/provider/21/{urn}`; category 21 is primary
+  schools, so the link 404s for every secondary, special and FE school
+  (checked: 137086, 101099, 130457, 145175). It now uses
+  `…/inspection-reports/find-inspection-report/provider/ELS/{urn}`, which
+  redirects to the right category and is what the school page already uses.