General issue: CWE-208 coverage for javascript

**Description**
CodeQL currently does not detect CWE-208 (Observable Timing Discrepancy) in JavaScript/TypeScript, while this weakness is covered in Java/Kotlin, Python and Ruby. This appears to be a language coverage gap rather than a configuration issue. [https://codeql.github.com/codeql-query-help/full-cwe/]

**Example**
In authentication or validation logic, I would expect CodeQL to at least be able
to model potential timing differences, for example:

``` js
if (value !== expectedValue) {
return res.status(401).json({ message: 'Invalid token' });
}
```

**Question**
Is there a plan to expand CodeQL query coverage for this weakness in the remaining languages?

Start with the CodeQL query help page for full CWE coverage and compare CWE-208 support in Java/Kotlin, Python, and Ruby with the JavaScript/TypeScript gap described here. Clarify the intended coverage and implementation scope; done would mean an agreed plan or added CWE-208 coverage for JavaScript/TypeScript.

Written by the indexing model from the issue text.