Crystal structure of catena-poly[(μ2-methanolato-κ2 O:O)-(μ2-1-((2-methyl-1H-benzo[d]imidazol-1-yl)methyl)-1H-benzo[d][1,2,3]triazole-κ2N:N′)-(thiocyanato-κ1 N)copper(II)] 0.25 hydrate, C17H16CuN6OS ⋅ 0.5H2O