fix: s3 upload compatibility (#14445)

fix #14432 

#### PR Dependency Tree


* **PR #14445** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Refactor**
* Improved file upload handling to ensure consistent support for
different data formats during object and multipart uploads.
* Enhanced type safety throughout storage and workflow components by
removing unnecessary type assertions.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/plugins/copilot/controller.ts

@@ -560,7 +560,7 @@ export class CopilotController implements BeforeApplicationShutdown {
                         status: data.status,
                         id: data.node.id,
                         type: data.node.config.nodeType,
-                      } as any,
+                      },
                     };
                 }
               })