Filter domain lists in cron/check_dns.php and cron/check_ssl.php to only include domains with statuses 'active' or 'expiring_soon', skipping statuses like available/expired/error/redemption_period/pending_delete. Add logging and stats for domains skipped by status. In check_ssl.php, add a hostnameResolves() helper and skip endpoints whose hostnames don't resolve (incrementing skipped_unresolved). Update summary output to report skipped counts. Remove the data-migration SQL that auto-enabled SSL monitoring and propagated last-checked times from migration 028 to avoid changing monitoring flags during schema upgrade.
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