Lightweight endpoint that returns only users with active TCP connections
and their IP addresses. Calls only get_active_ips_for_users() without
collecting recent IPs or building full UserInfo, significantly reducing
CPU and memory overhead compared to /v1/stats/users.
- Enhanced linting rules in `src/proxy/mod.rs` to enforce stricter code quality checks in production.
- Updated hash functions in `src/proxy/middle_relay.rs` for better efficiency.
- Added new security tests in `src/proxy/tests/middle_relay_stub_completion_security_tests.rs` to validate desynchronization behavior.
- Removed ignored test stubs in `src/proxy/tests/middle_relay_security_tests.rs` to clean up the test suite.
- Improved error handling and code readability in various transport modules, including `src/transport/middle_proxy/config_updater.rs` and `src/transport/middle_proxy/pool.rs`.
- Introduced new padding functions in `src/stream/frame_stream_padding_security_tests.rs` to ensure consistent behavior across different implementations.
- Adjusted TLS stream validation in `src/stream/tls_stream.rs` for better boundary checking.
- General code cleanup and dead code elimination across multiple files to enhance maintainability.
Added new endpoints:
- GET /v1/system/info
- GET /v1/runtime/gates
- GET /v1/limits/effective
- GET /v1/security/posture
Added API runtime state without impacting the hot path:
- config_reload_count
- last_config_reload_epoch_secs
- admission_open
- process_started_at_epoch_secs
Added background watcher tasks in api::serve:
- configuration reload tracking
- admission gate state tracking
