-* $RAILSPKG_DATABASE_LOAD_TASK defines the Rake task to load the database. API server uses db:structure:load. SSO server uses db:schema:load. Workbench doesn't set this, which causes the postinst to skip all database work.
-* If $RAILSPKG_SUPPORTS_CONFIG_CHECK != 1, it won't run the config:check rake task. SSO clears this flag (it doesn't have that task code).