S-18c · RegisterRecord objecttype defined + registered (closes #141) (#146)

## What & why

S-18c, the **final** slice of the S-18 (#19) split (after S-18a #142, S-18b #143). Defines the **RegisterRecord** objecttype — the schema S-19 (#20) will write canonical register records against on approval — and registers it in the Objecttypen API at startup.

Closes #141

### What

- **Schema** (`infra/objecttypen-registerrecord/registerrecord.schema.json`): public-safe by construction — `id`, `status` (enum `INGEDIEND`/`INGESCHREVEN`), `reference` only, `additionalProperties: false`, `dataClassification: open`. Mirrors the BFF's `OpenbaarEntry` — **no `bsn`/`naam`** (ADR-0027).
- **Registration**: a `registerrecord-init` compose one-shot (stdlib Python on the stack network) POSTs the objecttype + a **published** version over the API once Objecttypen is healthy. The Objecttypen `setup_configuration` (3.4.2) only provisions tokens — no declarative objecttype step — so this follows the ADR-0020 self-seed pattern. **Idempotent**: if a `RegisterRecord` with a version already exists it is a no-op.
- **Wiring**: schema + `register.py` streamed into the external `rr-registerrecord-config` volume by `seed-config.sh registerrecord` (main) / bind-mounted (local); added to `SEED`, `CFG_VOLS`, and the CI log-dump. `registerrecord-init` is a one-shot (not in `WAIT_SVCS`).
- **Smoke**: `verify-registerrecord` (`run-registerrecord-check.sh` + `registerrecord-check.py`) asserts the objecttype exists, has a **published** version, and that version's schema carries `id`/`status`/`reference`; added as a verify-stack step + a row in the #136 summary.
- **ADR-0027**: records the public-safe schema decision (mirror the BFF public view, not the internal projection; API-seeded one-shot). The slice issue #141 flagged the schema as ADR-worthy, so no separate adr-proposal issue was opened.

## Verified locally (end to end, real compose)

Seeded `rr-registerrecord-config`, brought Objecttypen up, ran `registerrecord-init` → `registered RegisterRecord <uuid> v1 (published)`. `make verify-registerrecord` → **OK — RegisterRecord v1 published, fields=['id', 'reference', 'status']**. Re-running the one-shot → **no-op** (idempotent). `docker compose config` clean on both files; schema + script + ci.yaml validated.

## Definition of Done

- [x] Failing smoke committed first (`test(infra): …`, "no objecttype named RegisterRecord"); implementation makes it pass.
- [x] Conventional Commits referencing #141.
- [x] CI green (verify-stack registerrecord step — validated locally; runner already unstarved by #145).
- [x] `docker compose up` reaches health (one-shot registers after Objecttypen healthy).
- [x] Docs: ADR-0027 + demo note.
- [x] Closed by the merging PR (`closes #141`).

This closes out the S-18 (#19) split — Objecttypen (S-18a) + Objecten (S-18b) + RegisterRecord (S-18c) are all up. Next: **S-19 (#20)** — ACL writes the register record to Objecten on approval, against this schema.

🤖 Generated with [Claude Code](https://claude.com/claude-code)Reviewed-on: #146

infra/run-registerrecord-check.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+#
+# S-18c (#141): assert the RegisterRecord objecttype is registered + published in the Objecttypen
+# API, against an ALREADY-RUNNING stack. Runs the check in a python:3-slim container on the stack
+# network (the service is reached by container IP; the runner can't reach published ports —
+# gitea-actions-gotchas.md §5/§6). Does NOT manage the stack lifecycle.
+set -euo pipefail
+
+here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+# The dev token provisioned by infra/objecttypen/setup_configuration/data.yaml.
+TOKEN="${OBJECTTYPEN_TOKEN:-0123456789abcdef0123456789abcdef01234567}"
+
+ot="$(docker ps -q --filter 'name=objecttypen' --filter 'health=healthy' | head -1)"
+[ -n "$ot" ] || ot="$(docker ps -q --filter 'name=[-_]objecttypen[-_]' | head -1)"
+[ -n "$ot" ] || { echo "ERROR: no running objecttypen container — bring the stack up first" >&2; exit 1; }
+net="$(docker inspect -f '{{range $k,$_ := .NetworkSettings.Networks}}{{$k}}{{"\n"}}{{end}}' "$ot" | head -1)"
+ip="$(docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' "$ot")"
+echo ">> network=$net objecttypen=$ip"
+
+cid="$(docker create --network "$net" \
+  -e "OBJECTTYPEN=http://$ip:8000" -e "OBJECTTYPEN_TOKEN=$TOKEN" \
+  -e "REGISTERRECORD_TIMEOUT=${REGISTERRECORD_TIMEOUT:-60}" \
+  python:3-slim python /registerrecord-check.py)"
+docker cp "$here/registerrecord-check.py" "$cid:/registerrecord-check.py" >/dev/null
+rc=0; docker start -a "$cid" || rc=$?
+docker rm -f "$cid" >/dev/null
+exit $rc