StudioFS v0.2.1

StudioFS 0.2.1

This release focuses on Linux performance work, including VFS optimizations,
alongside POSIX compliance testing and fixes. It also includes reliability
improvements and dependency updates accumulated since 0.2.0.

Highlights

• Accelerate Linux filesystem operations through VFS optimization.
• POSIX compliance testing and fixes for issues found during testing.
• Improve Linux mount responsiveness and tray-helper isolation.

Dependency updates

• Update aws-smithy-json to 0.62.7.
• Update rand 0.8 to 0.8.6 and rand 0.9 to 0.9.3.
• Update tray-icon to 0.26.1 and select its GTK-free KSNI backend on Linux,
  removing the tray's GTK3/GLib/AppIndicator dependency path affected by
  RUSTSEC-2024-0429.

Bug fixes

• Improve mounted write and metadata correctness across deferred creates,
  truncation, rename/unlink, hard links, extended attributes, and concurrent
  publication. Preserve newer local file data when uploads or peer updates
  arrive out of order.
• Improve random-write packing and cleanup of obsolete local payloads, while
  bounding cleanup work during mount startup and shutdown.
• Keep mounts responsive during local cache stalls and bound waits during
  shutdown and tray-helper teardown.
• Fix macFUSE directory refresh, file mapping, executable-file, and
  cross-user access behavior.
• Isolate the Linux tray in an owned helper so an unresponsive session D-Bus or
  tray watcher cannot hold mount startup or completion. A helper that cannot
  shut down normally is terminated and reaped after a two-second grace period.
• Preserve Linux tray synchronization status through StatusNotifierItem over
  session D-Bus. KDE and other compatible hosts can display the indicator;
  GNOME needs an AppIndicator/KStatusNotifierItem extension. Missing desktop
  support remains non-fatal for mounts. Windows/macOS use their native backends.

Source commit: fadd805