Add retry endpoint for failed tasks

aana/routers/task.py

@@ -135,6 +135,32 @@ async def delete_task(
     return TaskInfo.from_entity(task)
 
 
+@router.post(
+    "/tasks/{task_id}/retry",
+    summary="Retry Failed Task",
+    description="Retry a failed task by resetting its status to CREATED.",
+)
+async def retry_task(
+    task_id: str, db: GetDbDependency, user_id: UserIdDependency
+) -> TaskInfo:
+    """Retry a failed task by resetting its status."""
+    task_repo = TaskRepository(db)
+    task = task_repo.read(task_id, check=False)
+    if not task or task.user_id != user_id:
+        raise HTTPException(
+            status_code=404,
+            detail="Task not found",
+        )
+    if task.status != TaskStatus.FAILED:
+        raise HTTPException(
+            status_code=400,
+            detail="Only failed tasks can be retried",
+        )
+
+    updated_task = task_repo.retry_task(task.id)
+    return TaskInfo.from_entity(updated_task)
+
+
 # Legacy endpoints (to be removed in the future)
 
 

aana/storage/repository/task.py

@@ -274,6 +274,25 @@ def update_status(
             self.session.commit()
         return task
 
+    def retry_task(self, task_id: str) -> TaskEntity:
+        """Retry a task. The task will reset to CREATED status.
+
+        Args:
+            task_id (str): The ID of the task.
+
+        Returns:
+            TaskEntity: The updated task.
+        """
+        task = self.read(task_id)
+        task.status = TaskStatus.CREATED
+        task.progress = 0
+        task.result = None
+        task.num_retries = 0
+        task.assigned_at = None
+        task.completed_at = None
+        self.session.commit()
+        return task
+
     def get_active_tasks(self) -> list[TaskEntity]:
         """Fetches all active tasks.