{
  "id": "m0010",
  "title": "llm_usage 补 usages 列（非token用量因子）+ llm_vendor 删 protocol 列（模式归模型适配模板，2026-09-05 用户定夺）",
  "backup_tables": ["llm_usage", "llm_vendor"],
  "up": [
    {
      "op": "sql",
      "sql": "ALTER TABLE llm_usage ADD COLUMN usages TEXT COMMENT '非token用量因子JSON(时长/分辨率等,异步出账读入定价引擎)' AFTER status"
    },
    {
      "op": "sql",
      "sql": "ALTER TABLE llm_vendor DROP COLUMN protocol"
    }
  ],
  "down": [
    {
      "op": "sql",
      "sql": "ALTER TABLE llm_usage DROP COLUMN usages"
    },
    {
      "op": "sql",
      "sql": "ALTER TABLE llm_vendor ADD COLUMN protocol VARCHAR(20) NOT NULL DEFAULT 'openai_compat' COMMENT '协议类型' AFTER name"
    }
  ]
}