chore: Add cubic review rule for the shared sleep utility (no-changelog) (#35126)

cubic.yaml

@@ -327,6 +327,46 @@ reviews:
         `@/app/stores/workflowDocument.store.ts` to access migrated fields.
 
         This is an active migration. The list of migrated fields will grow over time.
+    - name: Use the Shared sleep Utility
+      description: |-
+        - Rule Statement:
+        Code must ALWAYS use `sleep` from `@n8n/utils/sleep` instead of
+        hand-rolling a helper that only wraps `setTimeout` in a promise. One
+        canonical helper keeps call sites consistent and makes its abortable
+        form discoverable — `sleep(ms, abortSignal?)` rejects early when the
+        signal fires, so a local abort-aware waiter is a violation too.
+
+        The `no-restricted-sleep-definition` and `no-restricted-sleep-import`
+        ESLint rules already catch helpers literally named `sleep` /
+        `sleepWithAbort` and named `sleep` imports from `n8n-workflow`. Do not
+        repeat those as review comments — this rule covers only what they
+        cannot see syntactically.
+
+        - Detection Criteria:
+        Flag NEW or MODIFIED code in `packages/**` where a delay is
+        re-implemented under a name ESLint does not restrict (`wait`, `delay`,
+        `pause`, `waitFor`, …) and the entire body is a promise wrapping
+        `setTimeout` with no additional behaviour:
+          - `const delay = (ms) => new Promise((resolve) => setTimeout(resolve, ms))`
+          - `async function wait(ms) { await new Promise((r) => setTimeout(r, ms)); }`
+        The shape is what matters, not the name. Also flag an inline, awaited
+        `new Promise((resolve) => setTimeout(resolve, ms))`.
+
+        - Do NOT flag:
+          - Wrappers that do more than wait: racing against another promise,
+            rejecting with a timeout error once the delay elapses, retry
+            backoff with jitter, debounce/throttle. (Rejecting on *abort* is a
+            violation — `sleep` takes the signal.)
+          - Bare `setTimeout` calls used for scheduling, not awaited as a delay
+          - Test-framework helpers such as `vi.advanceTimersByTime` or waiting
+            on fake timers
+          - `packages/@n8n/node-cli/**` and `packages/@n8n/typeorm/**`, which
+            cannot depend on `@n8n/utils` and are exempt from the ESLint rules
+          - Existing unchanged code (review only new or modified lines)
+
+        - Recommendation:
+        Import `sleep` from `@n8n/utils/sleep` — `await sleep(500)`, or
+        `await sleep(500, abortSignal)` when the wait must be cancellable.
 pr_descriptions:
   generate: false
   instructions: Each PR is supposed to have a limited scope. In your review, focus on changes made in the PR and avoid pointing out problems you found in the code that already existed.