Fix anyio 4.13 100% CPU hot-loop in CancelScope._deliver_cancellation#128

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constkolesnyak:upstream/anyio-cpu-fix

Commits on Jun 20, 2026

Patch anyio _deliver_cancellation to prevent 100% CPU hot-loop
constkolesnyak
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Fix anyio patch: skip current task and _must_cancel retries
constkolesnyak
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Fix anyio patch: skip done tasks to prevent zombie-scope hot-loop
constkolesnyak
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