v0.25.2

## ✨ Major Features

- Added comprehensive PostgreSQL database support as an alternative to SQLite
- Enhanced search capabilities with advanced indexing and filtering
- Improved Chinese language support with jieba tokenization
- Implemented caching and hashing for embedding generation

## 💻 Installation

For basic installation:
```bash
pip install memos
```

For PostgreSQL support:
```bash
pip install memos[postgresql]
```

## 📝 Detailed Changes

### 💾 Database Enhancements

- Added full PostgreSQL database support with migration tools
- Implemented SQLite to PostgreSQL database migration command
- Added persistent volume support for PostgreSQL data storage
- Enhanced database queries with sorting and eager loading optimizations
- Improved timestamp filtering for cross-database compatibility

### 🔍 Search Improvements

- Implemented advanced PostgreSQL full-text search with jieba tokenization
- Enhanced vector search capabilities with advanced indexing and filtering
- Optimized full-text search with improved prefix matching
- Added caching and hashing mechanisms for embedding generation

---

## ✨ 主要特性

- 新增了全面的 PostgreSQL 数据库支持，作为 SQLite 的替代方案
- 通过高级索引和过滤功能增强了搜索能力
- 使用 jieba 分词改进了中文语言支持
- 实现了嵌入生成的缓存和哈希机制

## 💻 安装

基本安装：
```bash
pip install memos
```

支持 PostgreSQL 的安装：
```bash
pip install memos[postgresql]
```

## 📝 详细变更

### 💾 数据库增强

- 新增了完整的 PostgreSQL 数据库支持，并提供了迁移工具
- 实现了 SQLite 到 PostgreSQL 数据库的迁移命令
- 新增了对 PostgreSQL 数据存储的持久卷支持
- 通过排序和预加载优化增强了数据库查询
- 改进了时间戳过滤功能，确保跨数据库兼容性

### 🔍 搜索改进

- 使用 jieba 分词实现了高级的 PostgreSQL 全文搜索
- 通过高级索引和过滤功能增强了向量搜索能力
- 优化了全文搜索的前缀匹配功能
- 新增了嵌入生成的缓存和哈希机制