docs/ADMIN_CLEANUP.md: what is in the control-api database and what must
not be touched, preparation (stop, backup, checks), ready SQL for a full
reset before a new run, the event log, the check registry, single
addresses and compaction, verification after the cleanup, restore from a
backup, and what to do through the API instead. Every SQL block was run
on a copy of the production backup. Linked from the README.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
