暂存一下,防止丢失

internal/application/notification/recipient.go

@@ -0,0 +1,8 @@
+package notification
+
+import "context"
+
+// DynamicRecipientResolver 定义后台通知动态接收人解析 Port。
+type DynamicRecipientResolver interface {
+	Resolve(ctx context.Context, targetKind string, targetID uint) ([]uint, error)
+}