Finish SAND-WP-0003: wise-validator extraction workplan

Add workplan, update migration-gaps delivered table, and extend sand-boxer
e2e.yml with health check for validate run self-smoke.

e2e/e2e.yml

@@ -1,8 +1,11 @@
 # Smoke contract for sand-boxer self-deploy verification (SAND-WP-0002-T10).
-# Test execution semantics belong to wise-validator (SAND-WP-0003).
+# Full validation via wise-validator: validate run ~/sand-boxer (SAND-WP-0003).
 name: sand-boxer
 compose_file: e2e/docker-compose.smoke.yml
-health_checks: []
+health_checks:
+  - name: smoke-nginx
+    url: http://127.0.0.1:18080
+    timeout: 60
 test_command: "true"
 timeout: 60
 cleanup: always