fix: improve streamin error to include error_type

router/src/server.rs

@@ -2530,6 +2530,7 @@ pub struct APIError {
 #[derive(serde::Serialize)]
 pub struct ErrorEvent {
     error: APIError,
+    error_type: String,
 }
 
 impl ErrorEvent {
@@ -2539,6 +2540,7 @@ impl ErrorEvent {
                 message: err.to_string(),
                 http_status_code,
             },
+            error_type: err.error_type().to_string(),
         }
     }
 }