Fix: Fixed an issue where variable aggregation operators could not be connected to other operators. #10427 (#11358)

### What problem does this PR solve?

Fix: Fixed an issue where variable aggregation operators could not be
connected to other operators. #10427

### Type of change


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

web/src/pages/agent/constant/index.tsx

@@ -700,13 +700,14 @@ export const RestrictedUpstreamMap = {
   [Operator.Placeholder]: [Operator.Begin],
   [Operator.DataOperations]: [Operator.Begin],
   [Operator.ListOperations]: [Operator.Begin],
+  [Operator.VariableAssigner]: [Operator.Begin],
+  [Operator.VariableAggregator]: [Operator.Begin],
   [Operator.Parser]: [Operator.Begin], // pipeline
   [Operator.Splitter]: [Operator.Begin],
   [Operator.HierarchicalMerger]: [Operator.Begin],
   [Operator.Tokenizer]: [Operator.Begin],
   [Operator.Extractor]: [Operator.Begin],
   [Operator.File]: [Operator.Begin],
-  [Operator.VariableAssigner]: [Operator.Begin],
 };
 
 export const NodeMap = {