[Router] use call_id instead of id for matching function calls in Responses API for Harmony (#13056)

Author: zhaowenzi

sgl-router/src/routers/grpc/harmony/builder.rs

@@ -603,11 +603,11 @@ impl HarmonyBuilder {
                     .iter()
                     .rev()
                     .find_map(|item| match item {
-                        ResponseInputOutputItem::FunctionToolCall { id, name, .. }
-                            if id == call_id =>
-                        {
-                            Some(name.clone())
-                        }
+                        ResponseInputOutputItem::FunctionToolCall {
+                            call_id: item_call_id,
+                            name,
+                            ..
+                        } if item_call_id == call_id => Some(name.clone()),
                         _ => None,
                     })
                     .ok_or_else(|| format!("No function call found for call_id: {}", call_id))?;

sgl-router/src/routers/grpc/harmony/responses.rs

@@ -1353,7 +1353,7 @@ fn build_next_request_with_tools(
             ..
         }) = items
             .iter_mut()
-            .find(|item| matches!(item, ResponseInputOutputItem::FunctionToolCall { id, .. } if id == &tool_result.call_id))
+            .find(|item| matches!(item, ResponseInputOutputItem::FunctionToolCall { call_id, .. } if call_id == &tool_result.call_id))
         {
             *output = Some(output_str);
             *status = if tool_result.is_error {