Can't parse escaped double quotes

```thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: TokenizerError("Expected close delimiter '\"' before EOF. at Line: 12920, Column 429")', src/main.rs:8:54```

The line contains escaped double quotes:

`'S-130, 190 , 290, 390 in 2005, 491 in 2012, 490 in 2017, L-180, 280, 380, WIMS Course, Wildfire Analyst Training, Misc. Ops and Plans Related Courses, Misc. \"I\" Courses.'`

使用 issue 中所示的转义引号输入和 src/main.rs:8 处的示例入口点重现 panic。跟踪 tokenizer 对转义双引号的处理，并验证该行能够成功解析且不会出现报告的 EOF 错误。当提供的输入不再触发 TokenizerError 时即表示完成。

由索引模型根据 Issue 内容生成。