Repo hygiene

Every check here is decided by the filesystem and by git. No source file is read, and no symbol is understood. That is the whole membership rule: a check that needs to know what a symbol is for, or whether a reference reaches it, does not belong in this catalog and belongs to senior-review:cleanup-auditor instead.

Two profiles over one catalog

The checks are defined once. Two profiles decide the perimeter, and nothing else differs between them. A caller names its profile; a check that has no meaning at the chosen perimeter is skipped rather than silently widened.