/api/bootstrap is single-shot per install (gated on COUNT(*) FROM
users, confirmed against internal/api/users.go and the chart's
bootstrap-job.yaml), not per identity — the two-identity bootstrap
plan and the delete-Secret-to-rotate runbook this section described
don't work against that. Rewrites §6 points 1/5/6 around a dedicated,
repeatable service-account credential instead (proposed server-side in
terdut-server's new SERVICE-ACCOUNTS.md), notes in §9 that Secret
mirroring is RBAC-sound but still hands out a server-admin-equivalent
credential per consenting namespace, and flags in §10 that chart-vs-
operator bootstrap ownership blocks §6 and needs deciding first.
Updates §13 to mark the service-account type as v1-blocking rather
than a someday improvement, and adds a version-discovery endpoint to
the same list (both this operator and terdut-tui currently detect
server capability by route-probing).