False positive: Java: Uncontrolled data used in path expression

**Description of the false positive**

This shouldn't be included because there is an adequate guard protecting against a path traversal payload.

**Code samples or links to source code**
```java
private Path indexRootPath(final String name) {
final Path result = rootDir.resolve(name);
if (result.startsWith(rootDir)) {
return result;
}
throw new WebApplicationException(name + " attempts to escape from index root directory", Status.BAD_REQUEST);
}
```

https://github.com/apache/couchdb/blob/43ab37ba6115851297de0804c563c1f0d23bf52a/nouveau/src/main/java/org/apache/couchdb/nouveau/core/IndexManager.java#L267-L273

**URL to the alert on GitHub code scanning (optional)**

https://github.com/Wolfi-Chainguard-Demo/apache__couchdb/security/code-scanning/6

Start with the linked Java code in nouveau/src/main/java/org/apache/couchdb/nouveau/core/IndexManager.java at lines 267-273 and inspect the associated CodeQL alert. Trace the query logic that reports the path expression and determine how the startsWith guard is represented. No test file is named; done means this guarded code is no longer reported as an uncontrolled path expression.

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