refactor: 移除冗余的 api_keys 和 api_key_audits 表

refactor: 数据集生成、精度测试、性能测试后端框架。

refactor:新增相关索引

update : doc

git commit -m "feat: schema fixes for uuid/jsonb/updated_at"

refactor: 更新数据库设计文档

refactor: enforce service/CRUD boundary in endpoints

refactor: 重构后端架构，拆分服务层并新增CRUD操作层

refactor: 移除旧的大模型请求逻辑。目前后端重构中...

refactor: api key storage scaffolding

update: 更新数据集和项目相关模型，优化序列化和查询逻辑

add 数据库设计文档

add alembic migrations and align db init flow

Update README.md

update