fix(publish): call sync_llm_product outside transaction block (stale read before commit)

wwwroot/api/llm_status_update.dspy

@@ -13,6 +13,7 @@ try:
             result['success'] = True
             result['message'] = '上架成功' if action == 'published' else '下架成功'
         if action == 'published':
+            # 同步必须放在事务块外：块内未提交时另一连接读到旧状态
             env = request._run_ns
             sync_fn = getattr(env, 'sync_llm_product', None)
             if sync_fn: