chore: 领域模型 & DTO

interval/model/message.go

@@ -0,0 +1,6 @@
+package model
+
+type Message struct {
+	Topic   Topic
+	Content []byte
+}

interval/model/subscription.go

@@ -0,0 +1,6 @@
+package model
+
+type Subscription struct {
+	Topic    Topic
+	ClientID string
+}

interval/model/topic.go

@@ -0,0 +1,7 @@
+package model
+
+type Topic string
+
+func (t Topic) Valid() bool {
+	return t != ""
+}