Stryker runs every test project in Acl.slnx regardless of test-projects, so
Acl.IntegrationTests (needs a live OpenZaak) failed 8 tests in every initial
run. Acl.slnx is read only by Stryker; the root solution still builds it.
Re-measured with a green initial run: 90.45 %, so break: 90 stands.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>