storage-cors-1 close after durable normal landing and ancestry proof

docs/testing/storage-cors-integrity.md

@@ -53,3 +53,7 @@ Nine regression scenarios pass. Original helper fails8/9 with exit1; empty-origi
 `npm ci --offline --ignore-scripts`: exit0,441 installed packages in4s from local cache. Initial lint exit127 absent stylelint; after install lint exit2 sandbox EPERM read-only git subprocess. Unchanged lint with sandbox permission exits0,11 checks. `npm run build`: exit0 incl dist artifact verification. No dependency file changes. Normal full-suite/landing slot reserved after client; awaiting explicit grant. Cloud IAM permissions, actual provider response serialization, concurrent read-modify-write races, browser/live playback remain unverified. Read-modify-write has no provider CAS guarantee and concurrent writers can still race.
 
 Final merged gate atbfa36a3f350d6a9751a1a43c83fc890c855091fc: full normal runner428/428 files exit0 with UNIT_TEST_TIMEOUT_MS=60000/NODE_TEST_CONTEXT unset; focused3/3 files(13 scenarios),lint11 checks,build/artifact pass. Resource wait949s before13:58:27UTC grant; full completed14:03:49UTC. No product changes since restored mutants. Normal landing pending; no real-cloud/concurrent-writer claim.
+
+## Durable completion
+
+Submission699d72927bee46bdafb6a7775a12d05f75e3c7e1 landed2026-10-20T14:09:21.582Z asd3f4c2155fe38d1b73554a6163f732b4c0ba3308. Durable landq result: landed, unchanged normal install+`npm test` gate exit0. `git log -1 unstable` matched landed SHA; `git merge-base --is-ancestor 699d72927bee46bdafb6a7775a12d05f75e3c7e1 unstable` exit0. Backlog closed only after these checks. Slot release14:09:38UTC (dispatch notification14:09:47UTC). No product edits after checked tree. Actual cloud/provider permissions/serialization/concurrent writers remain unverified; no-CAS race limitation remains. No browser/cloud/preview changes.