refactor(router): apply ns.route style (#26339)

api/controllers/console/datasets/rag_pipeline/datasource_content_preview.py

@@ -4,7 +4,7 @@ from flask_restx import (  # type: ignore
 )
 from werkzeug.exceptions import Forbidden
 
-from controllers.console import api
+from controllers.console import console_ns
 from controllers.console.datasets.wraps import get_rag_pipeline
 from controllers.console.wraps import account_initialization_required, setup_required
 from libs.login import current_user, login_required
@@ -13,6 +13,7 @@ from models.dataset import Pipeline
 from services.rag_pipeline.rag_pipeline import RagPipelineService
 
 
+@console_ns.route("/rag/pipelines/<uuid:pipeline_id>/workflows/published/datasource/nodes/<string:node_id>/preview")
 class DataSourceContentPreviewApi(Resource):
     @setup_required
     @login_required
@@ -49,9 +50,3 @@ class DataSourceContentPreviewApi(Resource):
             credential_id=args.get("credential_id"),
         )
         return preview_content, 200
-
-
-api.add_resource(
-    DataSourceContentPreviewApi,
-    "/rag/pipelines/<uuid:pipeline_id>/workflows/published/datasource/nodes/<string:node_id>/preview",
-)