{
  "id": "m0023",
  "title": "pipeline_user_memory 多租户隔离：加 org_id/user_id 归属列 + 存量 memory_key 重算（新 key 掺租户/作用域维度，防跨租户唯一键碰撞）+ 归属查询索引",
  "backup_tables": ["pipeline_user_memory"],
  "up": [
    {"op": "sql", "sql": "ALTER TABLE pipeline_user_memory ADD COLUMN org_id varchar(32) NOT NULL DEFAULT '' AFTER scope_id"},
    {"op": "sql", "sql": "ALTER TABLE pipeline_user_memory ADD COLUMN user_id varchar(32) NOT NULL DEFAULT '' AFTER org_id"},
    {"op": "sql", "sql": "UPDATE pipeline_user_memory SET memory_key = LEFT(MD5(CONCAT(content, '|org=', org_id, '|user=', user_id, '|scope=', scope, '|sid=', scope_id)), 16)"},
    {"op": "sql", "sql": "CREATE INDEX idx_memory_org_user ON pipeline_user_memory (org_id, user_id)"}
  ],
  "down": [
    {"op": "sql", "sql": "UPDATE pipeline_user_memory SET memory_key = LEFT(MD5(content), 16)"},
    {"op": "sql", "sql": "ALTER TABLE pipeline_user_memory DROP COLUMN user_id"},
    {"op": "sql", "sql": "ALTER TABLE pipeline_user_memory DROP COLUMN org_id"}
  ]
}