v0.2.2: headless mode, debug server auto-start, WS fix, watchdog hot-reload, example plugin

- --headless flag (skip TUI for SSH/systemd)
- InitService auto-starts cyrene_debug_server.py
- Fixed log WS URL (home.html/api/logs/ws -> api/logs/ws)
- PluginService watchdog hot-reload (plugins/ dir)
- example_plugin: 2 commands (echo, plugin_status)
- Tests: 15/15 passing

services/plugin_service.py

@@ -100,23 +100,6 @@ class PluginService:
             logger.error(f"加载所有插件时出错: {str(e)}", exc_info=True)
             raise
     
-
-    def _load_plugin_config(self, plugin_name: str) -> dict:
-        """加载并验证插件配置文件"""
-        import yaml
-        config_path = os.path.join(os.path.dirname(__file__), "..", "plugins", plugin_name, "config.yaml")
-        # Also check workspace plugins dir
-        workspace_config = os.path.join(os.getcwd(), "plugins", plugin_name, "config.yaml")
-        for path in [config_path, workspace_config]:
-            if os.path.exists(path):
-                try:
-                    with open(path) as f:
-                        return yaml.safe_load(f) or {}
-                except Exception as e:
-                    logger.error(f"解析插件配置失败 {path}: {e}")
-                    return {}
-        return {}
-
     async def load_plugin(self, plugin_name: str) -> bool:
         """加载单个插件 - 支持异步权限处理"""
         try: