Automated High-Frequency Trade Signal Processing Pipeline

Design a Laravel-based microservice that can ingest real-time stock market API feeds from multiple sources (Alpha Vantage, IEX Cloud), process complex trading signals using machine learning models, and automatically generate trade recommendation reports. The system must handle concurrent API requests, implement robust error handling, and store processed signals in a normalized MySQL database with Redis caching. Include rate limiting, secure credential management via Laravel Vault, and generate hourly compliance-ready audit logs.