Submit requires a bsn and starts the aggregate in INGEDIEND; the started
process-instance id is recorded; AttachZaak stores the ACL's zaak URL,
tolerating a duplicate (at-least-once worker delivery) and rejecting a
conflicting URL, without advancing the status.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Failing unit tests for the Registration aggregate root: a submission starts
in INGEDIEND carrying its bsn, an empty/whitespace/null bsn is rejected, the
started process-instance id is remembered, and attaching the zaak the ACL
opened records its URL idempotently (a conflicting URL is rejected) while the
status stays INGEDIEND.
The aggregate is a stub (no-op mutators, empty bsn) so the tests compile and
fail on their assertions; the green commit implements the invariants.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
