完善外部生成Worker动态扩缩容

新增外部生成controller进程角色与systemd服务

补齐队列统计procedure与spacetime-client绑定

更新生产部署脚本、健康巡检和server provision的worker/controller口径

新增容器worker smoke脚本并同步运维文档与团队记忆

server-rs/crates/spacetime-client/src/external_generation.rs

@@ -126,4 +126,23 @@ impl SpacetimeClient {
         )
         .await
     }
+
+    pub async fn get_external_generation_queue_stats(
+        &self,
+    ) -> Result<ExternalGenerationQueueStatsRecord, SpacetimeClientError> {
+        self.call_after_connect(
+            "get_external_generation_queue_stats_and_return",
+            move |connection, sender| {
+                connection
+                    .procedures()
+                    .get_external_generation_queue_stats_and_return_then(move |_, result| {
+                        let mapped = result
+                            .map_err(SpacetimeClientError::from_sdk_error)
+                            .and_then(map_external_generation_queue_stats_result);
+                        send_once(&sender, mapped);
+                    });
+            },
+        )
+        .await
+    }
 }