feat: disabled sse module and added health check to api_v2 for caddy2

api_v2/views/__init__.py

@@ -2,6 +2,7 @@
 api_v2 视图包。
 """
 
+from .healthy import HealthCheckView
 from .users import QuickCreateEmployeeUserView
 from .printing import (
     PrintingJobByCustomerView,
@@ -16,6 +17,7 @@ from .printing import (
 from .stateflow import BusinessObjectCloneView
 
 __all__ = [
+    'HealthCheckView',
     'QuickCreateEmployeeUserView',
     'PrintingJobByCustomerView',
     'PrintingJobV2Serializer',

api_v2/views/healthy.py

@@ -0,0 +1,39 @@
+import logging
+import os
+
+from django.db import connections, transaction
+from rest_framework.response import Response
+from rest_framework.views import APIView
+
+logger = logging.getLogger(__name__)
+
+
+class HealthCheckView(APIView):
+    """
+    GET /api/v2/health/
+
+    仅做最轻量的 DB 查询（SELECT 1）。
+    若失败（含超时）：直接退出当前进程，让容器重启。
+    """
+
+    authentication_classes: list = []
+    permission_classes: list = []
+
+    # 单条查询超时（毫秒）。避免 health check 卡死占用 worker。
+    STATEMENT_TIMEOUT_MS = 2000
+
+    def get(self, request):
+        try:
+            # 用事务包住 SET LOCAL，确保 statement_timeout 只对本次请求生效
+            with transaction.atomic(using="default"):
+                with connections["default"].cursor() as cursor:
+                    cursor.execute("SET LOCAL statement_timeout = %s;", [self.STATEMENT_TIMEOUT_MS])
+                    cursor.execute("SELECT 1;")
+                    cursor.fetchone()
+        except Exception:
+            logger.exception("api_v2 health check failed; exiting process")
+            os._exit(1)  # 等价于 Go 的 os.Exit(1)：立即退出进程
+
+        return Response({"status": "ok"})
+
+