Fix up sqlite DB export (mozilla#15379)

* Add VPN Resource Centre CMS models to the DB export

This got missed during development and my code review 🤦

* Ensure that the DB export doesn't contain any unpublished Pages

This covers pages which are still draft and have never been published
before, and also would cover pages that get retired in the future

bin/export-db-to-sqlite.sh

@@ -162,6 +162,9 @@ python manage.py dumpdata \
     mozorg.WebvisionDoc \
     mozorg.LeadershipPage \
     newsletter.Newsletter \
+    products.VPNCallToActionSnippet \
+    products.VPNResourceCenterIndexPage \
+    products.VPNResourceCenterDetailPage \
     externalfiles.ExternalFile \
     security.Product \
     security.SecurityAdvisory \
@@ -239,6 +242,10 @@ do
     echo "Purged now-redundant data from: $table"
 done
 
+# Delete Wagtail Page records that are not marked as Live
+sqlite3 $output_db "DELETE FROM wagtailcore_page WHERE live=0;"
+echo "Purged Page records that are not marked as live any more"
+
 # And to be sure that there are no relations pointing back to non-existent rows
 echo "Preparing statements for nullifying columns in temporary sql file. (Output is hidden because it's captured from stdout)."