Fix: WinHTTP handle leak in _WD_CDPExecuteCommand

[Danp2]

Pull request

Proposed changes

$hOpen and $hConnect were opened for every websocket-based CDP call but never closed on any code path (success or error), and $hRequest was only closed on the success path.

Close all three unconditionally before returning so long-running CDP polling doesn't exhaust WinHTTP handles.

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