{
  "id": "m0025",
  "title": "llm_usage 加 project_id 列+索引（2026-09-10 用户定夺：按项目统计费用；非项目调用哨兵值'0'（NOT NULL DEFAULT，对齐org_id '0'平台约定）；查询不传project_id=不区分项目。token绑定的project_id沿llm_bridge→token→推理端点→govern_settle全链透传落库）。dmig 幂等守卫：列/索引已存在自动跳过（create_tables.py 也会按 models 自动补列）",
  "backup_tables": [
    "llm_usage"
  ],
  "up": [
    {
      "op": "sql",
      "sql": "ALTER TABLE llm_usage ADD COLUMN project_id VARCHAR(32) NOT NULL DEFAULT '0' COMMENT '项目ID(sd_projects.id;''0''=非项目调用,查询不传=不区分项目)' AFTER ppid"
    },
    {
      "op": "sql",
      "sql": "CREATE INDEX idx_llm_usage_project ON llm_usage (project_id, created_at)"
    }
  ],
  "down": [
    {
      "op": "sql",
      "sql": "DROP INDEX idx_llm_usage_project ON llm_usage"
    },
    {
      "op": "sql",
      "sql": "ALTER TABLE llm_usage DROP COLUMN project_id"
    }
  ]
}