Use of cancellation ID in child features

[realf]

Hi, I am not sure if this is an old issue.

In the tutorial https://swiftpackageindex.com/pointfreeco/swift-composable-architecture/1.22.3/tutorials/composablearchitecture/01-04-composingfeatures, when we stop the timer on the first tab, the timer also stops on the second tab. This is probably because the cancellation ID is the same.

    private nonisolated enum CancelID {
        case timer
    }

* I added nonisolated due to "Main actor-isolated conformance of 'CounterFeature.CancelID' to 'Hashable' cannot satisfy conformance requirement for a 'Sendable' type parameter" error in Xcode 26.

[realf]

OK, it turns out there is an open PR addressing the issue #3418. Probably, the tutorial should elaborate why we need to use UUID, because CancelID.timer works just fine when there are no other tabs with the same feature.