Raised by terdut-operator's TerdutTeam controller (ROADMAP.md Stage 2):
an instance-scoped service account has no way to recover a team's id
after a 409 on POST /api/teams, unlike the equivalent, already-solved
case for service accounts themselves (GET /api/service-accounts?name=).
Also corrects a claim in SERVICE-ACCOUNTS.md's own text that doesn't
match AdminOnly's actual code -- confirmed against source, not assumed.