union/callback: 微信客服代码 @ b7913bc10f4ee551e8827156d38e86a1e186ee3c

dxc b7913bc10f first commit		2 lat temu
..
cb_customer.sql	b7913bc10f first commit	2 lat temu
cb_msg.sql	b7913bc10f first commit	2 lat temu
cb_service.sql	b7913bc10f first commit	2 lat temu
cb_servicer.sql	b7913bc10f first commit	2 lat temu
cb_staff.sql	b7913bc10f first commit	2 lat temu