feat(validate): add debounced validation for nodes in GenericNode component

fix(validate): set validation status to "success" or "error" based on response status
feat(validate): add state for validation status and outline color in GenericNode component
refactor(validate): use useDebouncedCallback hook for debouncing validation function
refactor(validate): simplify useEffect dependencies in GenericNode component

src/backend/langflow/api/validate.py

@@ -46,7 +46,7 @@ def post_validate_node(node_id: str, data: dict):
         node = graph.get_node(node_id)
         if node is not None:
             _ = node.build()
-            return node.params
+            return str(node.params)
         raise Exception(f"Node {node_id} not found")
     except Exception as e:
         logger.exception(e)