Set machine startup task ExecutionTimeLimit to unlimited

[Copilot]

--startup enable (machine-level) created a Task Scheduler entry without an explicit execution limit, so Windows applied the default 72-hour runtime cap. This could stop Capsense silently after long uptime despite intended always-on background behavior.

• Startup task configuration

  • Updated the machine-level startup path in set_startup_task(enable: bool) to explicitly set the scheduled task’s Settings.ExecutionTimeLimit to PT0S (unlimited) immediately after task creation.
  • Preserves existing behavior for task creation/deletion and error propagation; only extends post-create task settings.

• Implementation detail

  • After successful schtasks /Create, Capsense now invokes PowerShell to patch the task settings:

let ps_script = format!(
    "$task=Get-ScheduledTask -TaskName '{}';$task.Settings.ExecutionTimeLimit='PT0S';Set-ScheduledTask -InputObject $task | Out-Null",
    task_name
);