Added runtime side trace buffer, handled in a separate thread, limited to 1MB, and dropped after 3 seconds if not used by IDE. GetTraceVariables is not anymore blocking on next PLC cycle

import os
from POULibrary import POULibrary

class NativeLibrary(POULibrary):
    def GetLibraryPath(self):
        return os.path.join(os.path.split(__file__)[0], "NativeLib.xml")