In your python input the thresholds are set to:
max_forces=0.05*eV/Ang,
max_stress=0.05*eV/Ang**3,
The calculated forces and stresses in the log file are:
Max force = 0.0465979 eV/Ang
Max stress = 0.003555 eV/Ang**3
Both are lower than max_forces and max_stress. To start seeing some relaxation, you should set in your python script something like:
max_forces=0.025*eV/Ang,
max_stress=0.0025*eV/Ang**3,