chore(plugin): set hot-reload watcher interval to 60s

base/plugin_common/plugin_manager.py

@@ -61,7 +61,8 @@ class PluginManager:
         # 热加载相关
         self._watcher_thread: Optional[threading.Thread] = None
         self._watcher_stop_event = threading.Event()
-        self._watcher_interval = 2.0
+        # 默认每 60 秒扫描一次插件目录，降低线上资源消耗
+        self._watcher_interval = 60.0
         self._module_file_state: Dict[str, Dict[str, float]] = {}
         self._watcher_lock = threading.RLock()
 
@@ -132,9 +133,12 @@ class PluginManager:
             except Exception as e:
                 self.LOG.error(f"自动注入 bot 到插件 {plugin.name} 失败: {e}")
 
-    def start_hot_reload_watcher(self, interval_seconds: float = 2.0):
+    def start_hot_reload_watcher(self, interval_seconds: float = 60.0):
         """
         启动插件目录变更监听线程（轮询）
+
+        Args:
+            interval_seconds: 轮询间隔秒数，默认 60 秒
         """
         with self._watcher_lock:
             if self._watcher_thread and self._watcher_thread.is_alive():