Struct EngineDeps 

pub struct EngineDeps<S, H, U, E, C> {
    pub storage: Arc<S>,
    pub http: Arc<H>,
    pub uploader: Arc<U>,
    pub event_sink: Arc<E>,
    pub clock: C,
    pub trace: TraceHooks,
    pub metrics: Arc<dyn AsyncMetricSink>,
    pub max_http_inflight: usize,
    pub transport_lifecycle_tx: Option<UnboundedSender<TransportLifecycleEvent>>,
    pub transport_trace_tx: Option<TransportTraceSink>,
}

事件泵依赖聚合（泛型 ports + 配置）。

native / ffi 各自构造此结构（注入自家 EventSink egress），调 run_engine_loop。

Fields

storage: Arc<S>

http: Arc<H>

uploader: Arc<U>

event_sink: Arc<E>

clock: C

trace: TraceHooks

metrics: Arc<dyn AsyncMetricSink>

Host 边界共享异步指标出口；热路径只执行有界 try_record。

max_http_inflight: usize

Http effect 并发上限（Http BoundedSpawner 的 worker 数 N）。0 → .max(1) 兜底 1。

transport_lifecycle_tx: Option<UnboundedSender<TransportLifecycleEvent>>

transport_trace_tx: Option<TransportTraceSink>