deploy: clean release with secured container paths and dynamic model version

Add unit tests for stream service, live rail data, rate limiter, and ML models to increase coverage above 70%

Fix unit test compatibility and train/load RAC model artifacts

feat(fixes): replace agent core implementation and test suites with real behavior

fix(tests): resolve path error on Linux and clean unused imports

feat: implement database audit guard, WebSocket telemetry, rate limiter, outgoing call capper, and system status health check