The script had no CmdletBinding, so PowerShell dropped unrecognised named
arguments into $args instead of failing. A typo in a manifest entry Args -
"-WindowStartMinutes 45" - would have been ignored silently, and the capture
would have run at the wrong time with nothing in the log to explain it. That
is exactly how an hour went into debugging a time gate that was working.
Also adds WindowStartMinute so the window can open at :45 rather than on the
hour. A shift change is a moment, not an hour, and the first run of the day is
easiest to watch when it lands when somebody expects it.
f99ece1366