unreliable test: "review insecure file or project"

## Test Details

- Name of test:
- OS of failure:
- VSCode version of failure (minimum/insider/stable):
- Link to failing run:
- Link to failing test:

## Log of Test Failure

```
1) Amazon Q Code Review
/review entry
review insecure file or project
/review file gives correct critical and high security issues:

AssertionError [ERR_ASSERTION]: Expected values to be loosely deep-equal:

0

should loosely deep-equal

1
+ expected - actual

-0
+1

at hasExactlyMatchingSecurityDiagnostic (test/e2e/amazonq/review.test.ts:78:16)
at Context. (test/e2e/amazonq/review.test.ts:212:17)
```

## Additional Information

Start with test/e2e/amazonq/review.test.ts, especially hasExactlyMatchingSecurityDiagnostic at line 78 and the failing case around line 212. Run the end-to-end test to determine why the insecure file or project review returns zero diagnostics instead of one; done means the test reliably observes the expected critical and high security issues.

Written by the indexing model from the issue text.