fix(infra): repoint the acl at OpenZaak's IP before opening a zaak (refs #153)

The projection check now opens its zaak through the ACL, which puts it in the same bind
run-domain-check.sh already handles:

  400 {"name":"zaaktype","code":"bad-url","reason":"Voer een geldige URL in."}

OpenZaak reflects the request Host into the zaaktype `url` it returns and then rejects that
same URL on zaak-create when the host is single-label. The stack's ACL is configured with
`http://openzaak:8000/`, so it has to be recreated with ACL_OPENZAAK_BASEURL pointed at
OpenZaak's container IP first — the mechanism compose already documents on that variable.

Same class of constraint as the objecten.local alias (ADR-0029), and the third module now
known to reflect a request Host into data another module validates.

infra/run-projection-check.sh

@@ -12,11 +12,15 @@
 # which is the point of the re-source.
 #
 # All in-network, reaching services by container IP — single-label hosts aren't URL-valid and
-# the runner can't reach published ports (gitea-actions-gotchas.md §5/§6). Does NOT manage the stack
+# the runner can't reach published ports (gitea-actions-gotchas.md §5/§6). Does not own the stack
-# lifecycle (the caller owns bring-up + teardown). Plain docker primitives only. See ADR-0007/0008/0030.
+# lifecycle (the caller brings it up and tears it down), but does recreate the `acl` service to
+# repoint it — see below, and run-domain-check.sh, which does the same. Plain docker primitives only.
+# See ADR-0007/0008/0030.
 set -euo pipefail
 
 here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+root="$(cd "$here/.." && pwd)"
+compose="$root/infra/docker-compose.yml"
 WEBHOOK_AUTH="${NOTIFICATION_WEBHOOK_TOKEN:-Bearer big-reference-notifications}"
 
 cleanup() { docker rm -f rr-pverify rr-pquery >/dev/null 2>&1 || true; }
@@ -54,6 +58,19 @@ docker cp "$here/local/register-abonnement.py" "$drv:/subscribe.py" >/dev/null
 docker start -a "$drv"
 docker rm -f rr-pverify >/dev/null
 
+# OpenZaak reflects the request Host into the zaaktype `url` it returns, and then rejects that same
+# URL on zaak-create when the host is single-label ("Voer een geldige URL in."). The stack's ACL is
+# configured with `http://openzaak:8000/`, so it must be repointed at OpenZaak's container IP before
+# it can open a zaak — exactly what run-domain-check.sh does, and the same class of constraint as the
+# `objecten.local` alias (ADR-0029). The ACL resolves the zaaktype itself (S-27, ADR-0021), so the
+# base URL is the only thing to inject.
+echo ">> recreating the acl service pointed at OpenZaak's IP"
+ACL_OPENZAAK_BASEURL="http://$oz_ip:8000/" docker compose -f "$compose" up -d acl
+WAIT_TIMEOUT="${WAIT_TIMEOUT:-120}" bash "$here/wait-healthy.sh" acl
+# The container is replaced, so its IP may have changed.
+acl="$(docker ps -q --filter 'name=[-_]acl[-_]' | head -1)"
+acl_ip="$(ip "$acl")"
+
 echo ">> opening a zaak through the ACL (which writes the INGEDIEND register record)"
 reference="PROJ-$(date +%s)"
 zaak_url="$(docker run --rm --network "$net" curlimages/curl:latest \