fix: 继续收敛 codex trace 残余噪声 (#68)

Co-authored-by: Codex <codex@pikas.tech>

src/backend/codex-stdio.ts

@@ -606,7 +606,7 @@ function normalizeCodexNotification(message: JsonRecord, suppressed: SuppressedN
   if (method === "item/started" || method === "item/completed") {
     const item = asRecordAt(params, "item");
     const itemType = typeof item.type === "string" ? item.type : "unknown";
-    if (isSuppressedCodexItemType(itemType)) {
+    if (itemType !== "commandExecution" || isSuppressedCodexItemType(itemType)) {
       recordSuppressedNotification(suppressed, method, itemType);
       return { events: [] };
     }