modify: mqtt心跳转发

aibox_sophon_adapter/global_var.py

@@ -3,12 +3,15 @@ AI Box Sophon Adapter — 全局变量
 
 模块级共享资源管理。
 """
-from typing import Any
+from typing import Any, TYPE_CHECKING
 
 from chongming_database import Database
 from .models.orm import *
 from chongming_stream_manager import StreamManager
 
+if TYPE_CHECKING:
+    from .mqtt_forward import MQTTForwardClient
+
 # 数据库实例
 db: Database | None = None
 
@@ -16,6 +19,15 @@ db: Database | None = None
 stream_manager: StreamManager | None = None
 link_path: str | None = None
 
+# 外部 MQTT 转发客户端
+mqtt_forward: "MQTTForwardClient | None" = None
+
+# 上传文件根目录（用于清理告警关联视频）
+upload_root: str = "./data/uploads"
+
+# 告警保留配置
+alarm_max_records: int = 0  # 0 表示不限制
+
 # 心跳超时配置（秒）
 heartbeat_timeout: float = 15.0
 
@@ -38,5 +50,8 @@ __all__ = [
     "db",
     "heartbeat_timeout",
     "heartbeat_interval",
+    "mqtt_forward",
+    "upload_root",
+    "alarm_max_records",
     "set_global_var",
 ]