refactor(ci): one verify-stack stage for all live-stack checks (closes #58) (refs #46 #56)

On the single self-hosted runner CI jobs run sequentially, so booting OpenZaak once
beats once-per-job. Replace the integration + notifications + compose-smoke jobs with
one verify-stack job that brings the full stack up once and runs, as clearly-named
steps: health (make verify-up, the DoD smoke) → ACL ↔ OpenZaak (verify-acl) →
OpenZaak → NRC delivery (verify-nrc) → teardown (always) + log dump on failure.

The check logic moves into stack-agnostic runners (run-acl-integration.sh,
run-notification-check.sh) that operate on whatever stack is already up, reaching
services by container IP. The local single-concern wrappers (make integration oz-only,
make verify-notifications oz+nrc) keep working by delegating to the same runners, so
nothing is duplicated. make ci now runs the consolidated 'verify' stage.

Verified locally: make verify boots the full stack once, ACL integration passes and
the NRC notification is delivered, then tears down.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

infra/run-acl-integration.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+#
+# Run the ACL integration tests (Category=Integration) against the OpenZaak that is
+# ALREADY running — works for any stack: oz-only (`make integration`), the standalone
+# oz+nrc stack, or the full compose stack (the CI `verify-stack` job). Seeds a
+# published BIG zaaktype (idempotent), then builds + runs the test image on the stack
+# network, reaching OpenZaak by container IP (a single-label host isn't URL-valid;
+# the runner can't reach published ports — see gitea-actions-gotchas.md §5/§6).
+#
+# Does NOT manage the stack lifecycle: the caller owns bring-up + teardown. Plain
+# docker primitives only (docker/podman-portable). See ADR-0006.
+set -euo pipefail
+
+here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+root="$(cd "$here/.." && pwd)"
+
+# The OpenZaak API container, matched across compose projects + docker/podman naming
+# (`<project>[-_]openzaak[-_]<n>`); the delimiters exclude oz-db / oz-redis / oz-init.
+oz="$(docker ps -q --filter 'name=[-_]openzaak[-_]' | head -1)"
+[ -n "$oz" ] || { echo "ERROR: no running OpenZaak container found — bring the stack up first" >&2; exit 1; }
+net="$(docker inspect -f '{{range $k,$_ := .NetworkSettings.Networks}}{{$k}}{{"\n"}}{{end}}' "$oz" | head -1)"
+oz_ip="$(docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' "$oz")"
+oz_base="http://$oz_ip:8000"
+echo ">> OpenZaak at $oz_base on network $net"
+
+echo ">> seeding a published BIG zaaktype (idempotent)"
+sid="$(docker create --network "$net" -e "OZ_BASE=$oz_base" -e OZ_PUBLISH=1 \
+  python:3-slim python /seed.py)"
+docker cp "$here/openzaak/seed_catalogus.py" "$sid:/seed.py" >/dev/null
+docker start -a "$sid"
+docker rm -f "$sid" >/dev/null
+
+echo ">> building the integration test image"
+docker build -f "$root/services/acl/Dockerfile.integration" -t rr-acl-integration "$root/services/acl"
+
+echo ">> running the ACL integration tests (inside the network)"
+docker run --rm --network "$net" -e "OZ_BASE=$oz_base" rr-acl-integration