Add detailed error tracking

handler.py

@@ -68,4 +68,9 @@ class EndpointHandler:
             return [result]
 
         except Exception as e:
-            return [{"error": str(e)}]
+            import traceback
+            return [{
+                "error": str(e),
+                "type": type(e).__name__,
+                "traceback": traceback.format_exc()
+            }]