修复scalar_one_or_none相关limit

video-gen-api/app/tasks/generation_create_tasks.py

@@ -109,7 +109,7 @@ async def _run(task_id: str):
         result = await db.execute(select(ChatGenerationTask).where(
             ChatGenerationTask.id == task_id,
             ChatGenerationTask.deleted_at.is_(None),
-        ))
+        ).limit(1))
         task = result.scalar_one_or_none()
 
         if not task or task.generation_mode != "chatapi_async":
@@ -236,7 +236,7 @@ async def _run(task_id: str):
             result = await db.execute(select(ChatGenerationTask).where(
                 ChatGenerationTask.id == task_id,
                 ChatGenerationTask.deleted_at.is_(None),
-            ))
+            ).limit(1))
             task = result.scalar_one_or_none()
 
             if task:

video-gen-api/app/tasks/generation_download_tasks.py

@@ -61,7 +61,7 @@ async def _reload_task(db, task_id: str) -> ChatGenerationTask | None:
         select(ChatGenerationTask).where(
             ChatGenerationTask.id == task_id,
             ChatGenerationTask.deleted_at.is_(None),
-        )
+        ).limit(1)
     )
     return result.scalar_one_or_none()
 
@@ -72,7 +72,7 @@ async def _run(task_id: str):
             select(ChatGenerationTask).where(
                 ChatGenerationTask.id == task_id,
                 ChatGenerationTask.deleted_at.is_(None),
-            )
+            ).limit(1)
         )
         task = result.scalar_one_or_none()
         if not task or task.generation_mode != "chatapi_async":

video-gen-api/app/tasks/generation_poll_tasks.py

@@ -41,7 +41,7 @@ async def _reload_task(db, task_id: str) -> ChatGenerationTask | None:
         select(ChatGenerationTask).where(
             ChatGenerationTask.id == task_id,
             ChatGenerationTask.deleted_at.is_(None),
-        )
+        ).limit(1)
     )
     return result.scalar_one_or_none()
 
@@ -51,7 +51,7 @@ async def _run(task_id: str):
         result = await db.execute(select(ChatGenerationTask).where(
             ChatGenerationTask.id == task_id,
             ChatGenerationTask.deleted_at.is_(None),
-        ))
+        ).limit(1))
         task = result.scalar_one_or_none()
         if not task or task.generation_mode != "chatapi_async":
             return