Automated Trade Settlement Log Rotation and Compression Script

Design a robust Bash script that manages daily trade settlement log files for a high-frequency trading platform. The script must automatically rotate logs, compress files older than 7 days, implement strict file permission controls (600 mode), and generate a comprehensive audit trail. Include error handling for disk space constraints, ensure minimal performance impact, and create a parallel compression process that doesn't interrupt trading operations. The solution should be compatible with both Linux and Unix-like financial trading environments.