NanPan 6cdc600895
fix(e2b): keep shutdown retryable while maintenance workers are live (#6244)
* fix(e2b): retain teardown ownership across maintenance timeout

* fix(e2b): fence acquisition and preserve signal forwarding

* test(e2b): cover shutdown admission and signal forwarding

* docs(e2b): pin shutdown admission and signal invariants

* fix(e2b): scope deferred-cleanup signal handling

* test(e2b): exercise dedicated deferred-cleanup signal error

* style(tests): format E2B shutdown regression tests

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Co-authored-by: Willem Jiang <willem.jiang@gmail.com>
2026-10-05 15:37:33 +08:00
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