{
    "summary": [
        {
            "name": "sd_conversations",
            "title": "开发产线对话记录表",
            "primary": ["id"],
            "catelog": "entity"
        }
    ],
    "fields": [
        {"name": "id", "title": "主键ID", "type": "str", "length": 32, "nullable": "no"},
        {"name": "iteration_id", "title": "迭代ID", "type": "str", "length": 32, "nullable": "no"},
        {"name": "task_id", "title": "Pipeline任务ID", "type": "str", "length": 32},
        {"name": "step_name", "title": "关联步骤名", "type": "str", "length": 100},
        {"name": "role", "title": "角色", "type": "str", "length": 20, "nullable": "no", "default": "'user'"},
        {"name": "content", "title": "消息正文", "type": "text"},
        {"name": "attachments", "title": "附件列表JSON", "type": "text"},
        {"name": "msg_type", "title": "消息类型", "type": "str", "length": 20, "nullable": "no", "default": "'text'"},
        {"name": "org_id", "title": "组织ID", "type": "str", "length": 32, "nullable": "no", "default": "'0'"},
        {"name": "created_by", "title": "创建人", "type": "str", "length": 32},
        {"name": "created_at", "title": "创建时间", "type": "timestamp", "nullable": "no"}
    ],
    "indexes": [
        {"name": "idx_sd_conv_iteration", "idxtype": "index", "idxfields": ["iteration_id"]},
        {"name": "idx_sd_conv_task", "idxtype": "index", "idxfields": ["task_id"]},
        {"name": "idx_sd_conv_created", "idxtype": "index", "idxfields": ["created_at"]}
    ],
    "codes": [
        {"field": "role", "table": "appcodes_kv", "valuefield": "k", "textfield": "v", "cond": "parentid='sd_conversation_role'"}
    ]
}