Function registerCleanup

src/utils/cleanupRegistry.ts:14–17

(cleanupFn: () => Promise<void>)

 * @returns Unregister function that removes the cleanup handler
 */
export function registerCleanup(cleanupFn: () => Promise<void>): () => void {
  cleanupFunctions.add(cleanupFn)
  return () => cleanupFunctions.delete(cleanupFn) // Return unregister function
}

/**
 * Run all registered cleanup functions.