## What & why
S-09b (#75, split from #10) — the **approval flow** that completes the walking skeleton. A behandelaar can now approve a submitted registration; the entry flips from `INGEDIEND` to `INGESCHREVEN` in the public register. Flow: `POST /registrations/{id}/approve` (domain) → ACL sets the zaak eindstatus (ZGW `/statussen`) → OpenZaak → NRC → event-subscriber → projection → openbaar.
## Changes (bottom-up, each red→green TDD)
- **Domain** — `RegistrationStatus.Ingeschreven` + `Registration.Approve()` (guards: opened zaak, only from INGEDIEND); `ApproveRegistration` use case (idempotent) + temp `POST /registrations/{id}/approve` endpoint; `IAclClient.ApproveZaakAsync`.
- **ACL** — resolves the zaaktype's **eindstatus** from the catalogus (`isEindstatus` / highest volgnummer) and POSTs a ZGW status; exposed as `POST /statussen`. Unit + real-OpenZaak integration test.
- **Event-subscriber** — binds NRC `hoofdObject`, projects a `status`/`create` as `INGESCHREVEN` keyed on the zaak (updates the existing row), **without reading OpenZaak** (§8.1). Retains the ZGW `resource` in the log (new column + EF migration) so a rebuild reproduces the status.
- **e2e** — extended: submit → public INGEDIEND → approve → public INGESCHREVEN.
- **Docs** — ADR-0011 (the two non-obvious decisions + the walking-skeleton assumption) + demo note.
## Key decisions (see ADR-0011)
- **ACL discovers the eindstatus** (chosen over injecting a statustype URL): no new config/seed plumbing, domain stays ZGW-ignorant.
- **Any post-creation status-set ⇒ INGESCHREVEN**: in the walking skeleton the only status ever set after creation is the approval, and the subscriber may not read ZGW — documented to tighten when more transitions arrive (S-12+).
## Verification
- All .NET unit suites green locally (domain 47, acl 11, event-subscriber 14, bff 16, acceptance 7); Release build + `dotnet format` clean.
- No new compose config (the eindstatus-discovery approach avoided it).
- The real-OpenZaak integration test (ACL status-set) and the full submit→approve→visible e2e run in CI `verify-stack` (live NRC→projection + selectielijst egress, not reproducible locally).
closes#75
Reviewed-on: #77
The walking-skeleton e2e timed out waiting for the Keycloak login form
(`#username`). Root cause: in the compose network the portal is served over
plain HTTP on a non-localhost origin (http://self-service), which is not a
secure context, so Web Crypto (`crypto.subtle`) is undefined. angular-auth-
oidc-client needs SubtleCrypto to build the PKCE code challenge, so
`authorize()` threw ("Cannot read properties of undefined (reading 'digest')")
and the login redirect never fired.
Production serves the portal over HTTPS, where this works. Instead of
terminating TLS in the throwaway e2e stack, tell Chromium to treat the origin
as secure via --unsafely-treat-insecure-origin-as-secure. The flag is only
honoured by the full Chromium build (new headless), not Playwright's default
headless-shell, so pin channel: 'chromium'.
Verified against a minimal in-network stack (keycloak + self-service): login
redirect now reaches the Keycloak form, and the full login → token exchange →
authenticated portal renders with no console errors.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
tests/e2e Playwright spec drives DigiD login (jan-burger/test123) → submit →
confirmation against the compose-served portal. run-e2e-check.sh runs it inside the
compose network (node container, browser installed at runtime) so the token issuer
(keycloak:8080) matches the BFF authority (ADR-0010). Wired as verify-e2e (Makefile +
verify chain + a verify-stack CI step).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
