ADR-0087 exemption (no-migration-prescription): No metadata moves. No key is retired, no def is unpublished, no schema shape changes, and `sys_report_schedule`'s declaration is untouched apart from a comment — so `objectstack migrate meta`, `spec-changes.json` and the upgrade guide have nothing to rewrite and no ledger entry would have anything to say. The obligation this change creates is DATA-SIDE and operational, not a code rewrite: an operator checks `sys_report_schedule.last_status` for `failed` and corrects the row's `timezone`, and the schedule resumes on the next sweep by itself. That channel is the row the operator is already looking at, which is strictly more precise than a migration-chain entry about a metadata surface that did not change.