baseline: 批次A-D 成果 + membership 半成品（测试红）

backend/apps/notify/tasks.py

@@ -0,0 +1,24 @@
+"""预警调度任务 actors（Dramatiq）。"""
+
+import dramatiq
+
+from apps.core.models import Tenant
+from . import services as notify_services
+
+
+@dramatiq.actor(max_retries=3, time_limit=300_000)
+def run_alert_checks_for_tenant(tenant_id: int):
+    """单租户业务预警扫描（库存低限 + 应收逾期）。"""
+    tenant = Tenant.objects.get(pk=tenant_id, is_active=True)
+    result = notify_services.run_all_alert_checks(tenant)
+    return result
+
+
+@dramatiq.actor(max_retries=3, time_limit=600_000)
+def run_all_alert_checks_for_all_tenants():
+    """遍历全部活跃租户执行业务预警扫描（由 crontab 每日 08:00 触发）。"""
+    summary = []
+    for tenant in Tenant.objects.filter(is_active=True):
+        result = notify_services.run_all_alert_checks(tenant)
+        summary.append({"tenant": tenant.code, **result})
+    return summary