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%

Format code and adjust endpoints/models to pass all unit and integration tests

Format gnn_cascade.py with ruff

Fix undefined typing names in gnn_cascade.py

Merge remote changes, resolving conflicts in favor of local test compatibility

Fix unit test compatibility and train/load RAC model artifacts

feat(ml): implement v2.0 ML foundations and restore stream consumer

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

fix(health): expose flat fields for frontend system status bar

fix(backend): resolve container write permission and CPU spinning issues in background task

fix(requirements): add pytest-timeout dependency for integration tests

fix(requirements): add shap to requirements.txt for xgboost predictor loading in tests

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

fix(config): default to sqlite to avoid postgres connection failure on hf spaces

fix(backend): resolve type checking errors and name reuse conflicts

style: run ruff format on backend app files

fix: resolve ruff lint errors in backend

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

feat: implement centered bento layout endpoints and 10+ page helper features

fix: remove trailing slash from route definitions to prevent redirects

deploy: add Hugging Face Space README metadata

deploy: Hugging Face Spaces backend