fix: external data tool batch retrieve bug (#1472)

api/core/completion.py

         results = {}
         with ThreadPoolExecutor() as executor:
             futures = {}
-            for tools in grouped_tools.values():
-                # Only query the first tool in each group
-                first_tool = tools[0]
+            for tool in external_data_tools:
+                if not tool.get("enabled"):
+                    continue
+
                 future = executor.submit(
-                    cls.query_external_data_tool, current_app._get_current_object(), tenant_id, app_id, first_tool,
+                    cls.query_external_data_tool, current_app._get_current_object(), tenant_id, app_id, tool,
                     inputs, query
                 )
-                for tool in tools:
-                    futures[future] = tool
+
+                futures[future] = tool
 
             for future in concurrent.futures.as_completed(futures):
-                tool_key, result = future.result()
-                if tool_key in grouped_tools:
-                    for tool in grouped_tools[tool_key]:
-                        results[tool['variable']] = result
+                tool_variable, result = future.result()
+                results[tool_variable] = result
 
         inputs.update(results)
         return inputs
                 query=query
             )
 
-            tool_key = (external_data_tool.get("type"), json.dumps(external_data_tool.get("config"), sort_keys=True))
-
-            return tool_key, result
+            return tool_variable, result
 
     @classmethod
     def get_query_for_agent(cls, app: App, app_model_config: AppModelConfig, query: str, inputs: dict) -> str: