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- Updated SACConfig to replace standard deviation parameterization with log_std_min and log_std_max for better control over action distributions. - Modified SACPolicy to streamline action selection and log probability calculations, enhancing stochastic behavior. - Removed deprecated TanhMultivariateNormalDiag class to simplify the codebase and improve maintainability. These changes aim to enhance the robustness and performance of the SAC implementation during training and inference.