Function withSemaphore

src/lib/github-utils.ts:12–19

(semaphore: Semaphore, fn: () => Promise<T>)

 * Ensures the semaphore permit is always released, even if the function throws.
 */
export async function withSemaphore<T>(semaphore: Semaphore, fn: () => Promise<T>): Promise<T> {
  await semaphore.acquire();
  try {
    return await fn();
  } finally {
    semaphore.release();
  }
}

/**
 * Recursively list all files in a GitHub directory.