refactor: clean up health check and task access logic by removing unused code

backend/app/routes/tasks.py

@@ -11,7 +11,6 @@ from app.services.policy_service import (
     resolve_api_actor,
     resolve_web_actor,
 )
-from app.utils.auth import remember_task_access
 
 tasks_bp = Blueprint("tasks", __name__)
 
@@ -53,17 +52,6 @@ def get_task_status(task_id: str):
         task_result = result.result or {}
         response["result"] = task_result
 
-        # Remember the file UUID in the session so the download route can verify access.
-        # The download URL contains a different UUID than the Celery task ID.
-        download_url = task_result.get("download_url", "")
-        if download_url:
-            parts = download_url.split("/")
-            # URL format: /api/download/<file_uuid>/<filename>
-            if len(parts) >= 4:
-                file_uuid = parts[3]
-                if file_uuid != task_id:
-                    remember_task_access(file_uuid)
-
     elif result.state == "FAILURE":
         response["error"] = str(result.info) if result.info else "Task failed."