feat(conversation): add conversation_scene field

backend/mci-server/src/main/java/com/sino/mci/channel/entity/Conversation.java

@@ -30,5 +30,6 @@ public class Conversation extends BaseEntity {
     private Long contractId;
     private String channelCode;
     private String receiveConfig;
+    private Integer conversationScene;
     private Integer status;
 }

backend/mci-server/src/main/resources/db/migration/V23__add_conversation_scene.sql

@@ -0,0 +1,7 @@
+ALTER TABLE mci_conversation
+ADD COLUMN conversation_scene TINYINT NULL COMMENT '会话场景：1=内部群 2=外部群';
+
+-- 现有数据：群聊默认外部群（客户群）
+UPDATE mci_conversation
+SET conversation_scene = 2
+WHERE conversation_type = 2 AND conversation_scene IS NULL;