增加相关功能

go/models/backend_ai_chat_message.go

@@ -0,0 +1,17 @@
+package models
+
+import "time"
+
+// BackendAiChatMessage AI聊天消息表
+type BackendAiChatMessage struct {
+	ID         uint64    `orm:"column(id);pk;auto" json:"id"`
+	TenantID   string    `orm:"column(tenant_id);size(64)" json:"tenant_id"`
+	SessionID  uint64    `orm:"column(session_id)" json:"session_id"`
+	Role       string    `orm:"column(role);size(20)" json:"role"` // user / assistant
+	Content    string    `orm:"column(content);type(text)" json:"content"`
+	CreateTime time.Time `orm:"column(create_time);auto_now_add;type(datetime)" json:"create_time"`
+}
+
+func (m *BackendAiChatMessage) TableName() string {
+	return "yz_backend_ai_chat_message"
+}