refactor(org): keep archived-team grants as dead rows

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.

hub/test/integration/admin-members-teams.test.ts

@@ -176,7 +176,7 @@ describe("admin members + teams API", () => {
       });
       expect(archive.statusCode).toBe(200);
       expect(archive.json()).toEqual(
-        expect.objectContaining({ archived: true, revokedGrants: 1 }),
+        expect.objectContaining({ archived: true, teamId: team.id }),
       );
 
       const after = await app.inject({