A custom profile that mounts no telemetry-otel row exports nothing, so
DSH_TELEMETRY_DISABLED must not fail its boot (CI exports the switch
globally, which broke the lifecycle-fixture profile). The web-app dist
resolution test accepts the fail-loud unbuilt outcome the CI coverage lane
sees before any build, and the headless spec covers the idle-anchor and
pre-start skip branches under the per-file gate.