feat: add task lifecycle management and improve generation reliability

Centralize timeout policies, stall detection, and error classification
for image/video/text generation tasks. Improve ecommerce OSS upload flow
and add script evaluation enhancements.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/features/ecommerce/ecommerceVideoService.ts

@@ -312,6 +312,8 @@ export async function renderSceneImage(
 
   const resultUrl = await waitForTask(taskId, {
     abortRef,
+    kind: "image",
+    model: "gpt-image-2",
     onProgress: (e) => callbacks.onSceneImageProgress(input.sceneId, e.progress),
   });
 
@@ -367,6 +369,8 @@ export async function renderScene(
 
   const resultUrl = await waitForTask(taskId, {
     abortRef,
+    kind: "video",
+    model,
     onProgress: (e) => callbacks.onSceneProgress(input.sceneId, e.progress),
   });