3D 冒烟示例单端点失败不再中断其余端点

- wait_for_task / get_task / download_model 失败时记录该端点错误并继续
- 保留 throw_on_failure: false 的原有语义，仅补齐传输与超时类错误

server-rs/crates/platform-tripo/examples/tripo_generation_smoke.rs

@@ -138,7 +138,10 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     ] {
         // The SDK poller is used only by this smoke example. It is not part
         // of the platform-tripo public API.
-        sdk_client
+        //
+        // 每个端点单独报错并继续：这个示例的目的是一次跑完三个端点，
+        // 某个端点超时 / 传输失败不应把剩下的端点一起跳过。
+        if let Err(error) = sdk_client
             .wait_for_task(
                 &handle.task_id,
                 WaitOptions {
@@ -149,9 +152,19 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
                     ..WaitOptions::default()
                 },
             )
-            .await?;
+            .await
+        {
+            eprintln!("{name} skipped: wait failed: {error}");
+            continue;
+        }
 
-        let snapshot = client.get_task(&handle).await?;
+        let snapshot = match client.get_task(&handle).await {
+            Ok(snapshot) => snapshot,
+            Err(error) => {
+                eprintln!("{name} skipped: task lookup failed: {error}");
+                continue;
+            }
+        };
         println!(
             "{name} status={:?} progress={:?} output={:?}",
             snapshot.status, snapshot.progress, snapshot.output
@@ -165,7 +178,13 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
             continue;
         }
 
-        let downloaded = client.download_model(&snapshot).await?;
+        let downloaded = match client.download_model(&snapshot).await {
+            Ok(downloaded) => downloaded,
+            Err(error) => {
+                eprintln!("{name} skipped: artifact download failed: {error}");
+                continue;
+            }
+        };
         let filename = downloaded.filename(name);
         let mut file = File::create(&filename).await?;
         let mut bytes = 0u64;