QA on 10.0.0.8 (mount-issues.md findings 2 and 3) showed the reconciler
path missed both NTFS accommodations that mount_drive() and
add_fstab_entry() already have: secondary NTFS drives mounted owned by
root (writable only via ntfs-3g's permissive default), and a dirty NTFS
volume would fail to mount at boot with no cleanup attempted.
Inject uid/gid for ntfs/ntfs3 in the reconciler, and run ntfsfix -d in
SubprocessMountExecutor before NTFS mounts (translating UUID=/LABEL=
specs to /dev/disk/by-* paths, which ntfsfix needs). Also return an
error MountResult instead of raising when a binary is missing, per the
executor protocol.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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