False positive: sentence capitalization in tables

**What got flagged?**

```md
| a table header |
| -------------------------------------------- |
| protection from accidental commits to happen |
```

`SentenceCapitalization`on `protection`

**Why is this incorrect?**
1. It is not a sentence.
2. Capitalization often is omitted in table cells, so it might make sense to disable`SentenceCapitalization` in tables entirely, or at least make that an option.

Reproduce the Markdown table example, then trace the SentenceCapitalization rule and the entry point that handles table cells. Done means this example is no longer incorrectly flagged, either through table-aware behavior or a clearly defined table-specific option.

Written by the indexing model from the issue text.