后台更新 服务优化

backend-java/src/main/java/com/nanri/aiimage/config/ImageVideoProperties.java

@@ -18,6 +18,8 @@ public class ImageVideoProperties {
     private String voiceSynthesisWorkflowId = "7652954297530105894";
     private int cozeConnectTimeoutMillis = 10000;
     private int cozeReadTimeoutMillis = 3600000;
+    /** Maximum Coze response body retained by the image/video client. */
+    private int cozeResponseMaxBytes = 2 * 1024 * 1024;
     private int archiveConnectTimeoutMillis = 10000;
     private int archiveReadTimeoutMillis = 600000;
     private int archiveMaxAttempts = 3;

backend-java/src/main/java/com/nanri/aiimage/config/SimilarAsinProperties.java

@@ -61,8 +61,8 @@ public class SimilarAsinProperties {
      */
     private int cozeSubmitMaxRetryCount = 5;
 
-    /** 图片下载、解码和缩放共享该池；默认 8，避免批量结果生成占满整机 CPU。 */
-    private int imageDownloadPoolSize = 8;
+    /** 图片下载、解码和缩放共享该池；4 核生产机默认 2，避免图片任务占满整机 CPU。 */
+    private int imageDownloadPoolSize = 2;
 
     /**
      * 单张图片下载超时（秒）。
@@ -78,6 +78,13 @@ public class SimilarAsinProperties {
     /** 多源结果文件组装的单任务硬上限；运行期间由文件任务 heartbeat 保活。 */
     private int resultFileTimeoutMinutes = 90;
 
+    /**
+     * Assemble each source workbook from chunk-scoped result maps.  Keeping a
+     * switch makes rollback possible for an existing deployment while the new
+     * bounded path is observed in production.
+     */
+    private boolean boundedResultAssemblyEnabled = true;
+
     /**
      * assemble 阶段 taskImageCache 的字节上限。
      * 默认 256MB：5000 行 × 3 列 × 平均 100KB = 1.5GB 远超 2GB 堆，