Make FileLogger thread-safe - #6571

On November 2, 2026, GitHub will restrict `pull_request_target` on public repositories by default. To continue allowing the event trigger, configure an Actions policy. Learn more: https://gh.io/securely-using-pull_request_target#default-policy-for-pull_request_target

Line matches candidate pattern (assign regex) `= /[^*].*?(?:[a-z]{3,}|[A-Z]{3,}|[A-Z][a-z]{2,}).*/[gi]?(?=\W|$)` (candidate-pattern)

Line matches candidate pattern (regex choice) `\(\?:[^)]+\|[^)]+\)` (candidate-pattern)