site: correct the conformance-corpora claim (19 corpora, 249 fixtures)

The landing page said "five shared conformance corpora ... metamodel (~90
fixtures)". There are 19 corpora and the metamodel corpus holds 249 fixtures;
api-contract runs in both the reference and generated lanes. Also names verify
and extract, which the old sentence omitted entirely.

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

Author: claude

www/index.html

@@ -223,7 +223,7 @@ <h2 class="section-label">Five ports. All installable today.</h2>
         </tbody>
       </table>
       <p class="impl-note">
-        Five shared conformance corpora at <a href="https://github.com/metaobjectsdev/metaobjects/tree/main/fixtures"><code>fixtures/</code></a> — metamodel (~90 fixtures), render, persistence (24/24 against Testcontainers Postgres), API contract (cross-port), YAML — validate every implementation byte-identically against shared expectations.
+        Nineteen shared conformance corpora at <a href="https://github.com/metaobjectsdev/metaobjects/tree/main/fixtures"><code>fixtures/</code></a> — metamodel (249 fixtures), render, verify, extract, persistence (24 query scenarios against Testcontainers Postgres), API contract (cross-port, reference <em>and</em> generated lanes), YAML and more — validate every implementation against the same expectations.
       </p>
     </section>