一对一聊天重构，期待群聊开发

script/sql/20241120表结构备份/ACT_HI_ATTACHMENT.sql

@@ -0,0 +1,17 @@
+create table fad_oa.ACT_HI_ATTACHMENT
+(
+    ID_           varchar(64)   not null
+        primary key,
+    REV_          int           null,
+    USER_ID_      varchar(255)  null,
+    NAME_         varchar(255)  null,
+    DESCRIPTION_  varchar(4000) null,
+    TYPE_         varchar(255)  null,
+    TASK_ID_      varchar(64)   null,
+    PROC_INST_ID_ varchar(64)   null,
+    URL_          varchar(4000) null,
+    CONTENT_ID_   varchar(64)   null,
+    TIME_         datetime(3)   null
+)
+    collate = utf8mb3_bin;
+