arch(acl): ADR-0006 — provision the ACL integration test against the compose stack (refs #46)

Records why the integration test targets the running compose stack rather than a
Testcontainers graph (no .NET compose support; not hermetic anyway due to the
Selectielijst dependency), the opt-in publish seed, and the chunked-body bug the
test caught. Proposed in #53.

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

mkdocs.yml

@@ -27,6 +27,7 @@ nav:
       - "ADR-0003: ACL default-fill": architecture/adr-0003-default-fill.md
       - "ADR-0004: BDD framework": architecture/adr-0004-bdd-framework.md
       - "ADR-0005: Mutation testing": architecture/adr-0005-mutation-testing.md
+      - "ADR-0006: ACL integration test provisioning": architecture/adr-0006-integration-test-provisioning.md
   - Working in Gitea: gitea-workflow.md
   - Runbooks:
       - CI: runbooks/ci.md