88a82ee860
Add XML doc comments to public properties across EventTypes, Connz, Varz, NatsOptions, StreamConfig, IStreamStore, FileStore, MqttListener, MqttSessionStore, MessageTraceContext, and JetStreamApiResponse. Fix flaky tests by increasing timing margins (ResponseTracker expiry 1ms→50ms, sleep 50ms→200ms) and document known flaky test patterns in tests.md.