## Why
An inherited `FILE_DELETE_CHILD` grant can make a write root look stale, but
`SET_ACCESS` cannot replace an ACE inherited from an ancestor. Treating that
grant as explicit causes unnecessary ACL refresh attempts that cannot converge.
## What changed
- Add explicit-ACE filtering to the Windows DACL permission checks.
- Refresh a write root only when `FILE_DELETE_CHILD` is present in an explicit
allow ACE, while retaining effective-permission checks for required rights.
- Ignore inherited stale rights when deciding whether `SET_ACCESS` must repair
an allow ACE.
## Testing
Add a Windows regression test covering a write root that inherits
`FILE_DELETE_CHILD`, verifying that repeated refresh checks leave its explicit
write ACE unchanged.
GitOrigin-RevId: d0df9429efcf299da3ff3c1bce92942684803293
Felipe Coury
bd92b056dd