Source: MIZOKI audit 2026-09-06 (pinned fc8b03f9) → work-order backlog 2026-09-08 (docs/audits/AUDIT_WORK_ORDERS_2026-09-08.md). Findings are hypotheses until reproduced on current main (WO-00).

Finding (re-confirmed on local main 15a6ba29b): google_ads.py:55 defaults GOOGLE_ADS_API_VERSION to v21; v21 sunset 5 Aug 2026; no version override in the runner workflow; adapters checked disabled. Dormant activation blocker [R24][W16][W17]. Files: services/service-action-runner/execution_adapters/google_ads.py; runner deploy workflow env. Fix: default to a currently supported version (release notes list v25.1, 19 Aug 2026 — confirm latest supported at implementation time); test every mutation and read-back contract against the new version. Acceptance: validate-only mutation + read-back succeeds in a test account; CI asserts default version is not in Google's sunset list. Depends on: WO-00.