Archiving a team no longer cascade-revokes its active TEAM->PROJECT grants
and memberships. The archived flag alone makes the team principal
unresolvable (permissions/principals.ts refuses archived teams), so the
dead grant/membership rows confer no access. listProjectTeamAccess now
filters archived teams out of the project view instead of relying on a
revokedAt cascade, and the org-admin teams page confirm copy is updated.
archiveTeam drops the revokedGrants count from its return shape.
ADR-0019 / Spec.System.Organization: principal resolution, not grant
mutation, is the access boundary for archived teams.