fix(release-notes): let Artur sync acknowledge known-in-source drift

[outof-place]

Problem

The "Sync Approved Artur Release" workflow refuses to build the Artur snapshot for 2026.08.3. Its drift guard (findUnbackportedDestinationCommits) flags Arthur commit 6cf7474224eaeb97aca9e77a6a4bedb26045df01 (PR #23, "support investigate keyword schema") as an application commit missing from the source snapshot.

This is a false positive. That commit removes maxItems from KEYWORDS_SCHEMA in apps/worker/src/workflows/blocks/investigate.ts. Source main already omits maxItems from that schema, so the end state is identical: overwriting Arthur with the source snapshot preserves the change rather than reverting it. The patch-id guard flags it only because no source commit in the selected range carries that exact patch (source dropped it earlier / never had it).

Change

sync-artur now reads an optional scripts/release-notes/acknowledged-drift.json from --source-main (live main). Any listed commit that the guard flags is excluded from the fatal check and recorded under acknowledgedDrift in the sync result for audit. Commits that are not listed still hard-fail exactly as before.

The one acknowledged entry documents why #23 is safe. Tracked under AIW-281.

Safety

• Acknowledging one full SHA suppresses only that exact commit; any other real un-backported commit still blocks the sync (covered by a test).
• The data file is read from --source-main (live main), so it is reviewed here. The snapshot is frozen at the approved targetSourceCommit, so this tooling change is not shipped into the Arthur snapshot.

Verification

• pnpm typecheck:release-notes clean
• pnpm test:release-notes 16/16 pass, incl. two new cases: acknowledged drift proceeds + records; unacknowledged drift still blocks.

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Project	Deployment	Actions	Updated (UTC)
ai-workflow-app-dashboard	Ready	Preview	Aug 17, 2026 10:09am

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