Release sqlparser-rs version `0.64.0` around 2026-10-31

Follow on to
- https://github.com/apache/datafusion-sqlparser-rs/issues/2453

This ticket tracks creating the next sqlparser release (mostly so others can follow along)

**Target Release Date**: Approximately 2026-10-31

Release instructions: https://github.com/apache/datafusion-sqlparser-rs/blob/main/dev/release/README.md

Steps:
- [ ] Make a PR to update version / `CHANGELOG.md`:
- [ ] Tested with downstream projects (e.g. DataFusion):
- [ ] Create a Release Candidate (RC) and start vote:
- [ ] (When vote is approved) release to crates.io
- [ ] Make ticket for next release:

Required fixes:
- [ ] None yet 🎉

从 dev/release/README.md 开始，查看版本 0.64.0 的发布检查清单。协调版本和 CHANGELOG.md 的更新、DataFusion 等下游测试、发布候选版本投票以及在 crates.io 上发布。当已批准的版本发布且下一个版本的 issue 已创建后，该 issue 即完成。

由索引模型根据 Issue 内容生成。