## What changed
- Report the executor's user home in environment metadata.
- Cache the reported home on selected turn environments and include it in
filesystem sandbox contexts, including `apply_patch` requests.
- Preserve compatibility with executors that do not report a home directory.
## Testing
- Cover local, remote, inherited, serialized, and `apply_patch` sandbox
contexts.
GitOrigin-RevId: ea65e68e33a80bc9bcfc7c53b1486ab944699470