luo jiyin d2116d861b
fix(sandbox): sync same-size E2B output updates (#4329)
* fix(sandbox): detect same-size E2B output updates

* test(sandbox): cover E2B output modification times

* fix(sandbox): persist E2B output sync versions

* test(sandbox): cover E2B output sync manifest

* docs(backend): document E2B sync manifest

* fix(sandbox): scope E2B sync manifests

* test(sandbox): cover E2B sync manifest lifecycle

* docs(backend): describe E2B manifest lifecycle

* fix(sandbox): fall back from empty E2B sandbox ID

* test(sandbox): cover empty E2B sandbox IDs

* docs: clarify E2B output sync ownership
2026-07-21 22:30:14 +08:00
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