Shkarko Codex Usage Meter for Windows 0.8.0

- Keeps a missing weekly window unavailable instead of presenting five-hour usage as weekly data or generating weekly notifications from it.
- Expires inactive task activity after ten minutes even when the task-start event has left the last MiB of the session file.
- Honors `CODEX_HOME` consistently for session reads and activity watchers while retaining the default `.codex` location when it is unset or empty.
- Restores tray tooltips and keyboard activation with the native version-4 notification-icon protocol, and places keyboard-opened menus at the tray icon.
- Recovers pinned widgets when a display is removed or their saved position is off-screen, using physical display coordinates without taking focus.
- Preserves startup preferences during installed updates, migrates enabled startup during automatic portable-to-installed updates, and removes only the uninstalled copy's startup registration.
- Cleans abandoned temporary update directories older than 24 hours without removing recent downloads or unrelated temporary files.
- Targets .NET 10 and publishes self-contained Windows x64 builds; development and CI now use the .NET 10 SDK.
- Adds release-version consistency checks, focused regression checks, installer integration checks, and a reusable WinGet manifest generator.
- Documents the release checklist and bug-report requirements, and refreshes README screenshots with synthetic usage data.