fix: Binary.Scan 复制驱动返回的字节切片，避免连接读缓冲复用导致 BLOB 数据错乱 - #40

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/