luo jiyin da3feb3863
fix(sandbox): fail E2B bootstrap safely (#4325)
* fix(sandbox): fail E2B bootstrap safely

* test(sandbox): cover E2B bootstrap cleanup

* docs(backend): document E2B bootstrap failure

* fix(sandbox): discard E2B bootstrap failures

* test(sandbox): cover E2B reconnect bootstrap failures

* docs(backend): clarify E2B bootstrap recovery

* fix: preserve E2B bootstrap errors

* fix: reject falsey E2B bootstrap errors
2026-07-21 22:22:20 +08:00
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