Feat: Display error messages from intermediate nodes of the webhook. #10427 (#11954)

### What problem does this PR solve?

Feat: Remove HMAC from the webhook #10427

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/utils/api.ts

@@ -202,6 +202,9 @@ export default {
   prompt: `${api_host}/canvas/prompts`,
   cancelDataflow: (id: string) => `${api_host}/canvas/cancel/${id}`,
   downloadFile: `${api_host}/canvas/download`,
+  testWebhook: (id: string) => `${ExternalApi}${api_host}/webhook_test/${id}`,
+  fetchWebhookTrace: (id: string) =>
+    `${ExternalApi}${api_host}/webhook_trace/${id}`,
 
   // mcp server
   listMcpServer: `${api_host}/mcp_server/list`,