I need a small Windows utility, written entirely in Python, that can verify large lists of Indonesian DANA e-wallet numbers in one go. I’ll supply a plain-text (.txt) file—one number per line—and expect the tool to scan the list at high speed with no preset limits. Core deliverables • A stand-alone .exe for Windows 10/11 (PyInstaller or similar is fine). • Input: select a text file; Output: two new files—valid.txt and invalid.txt—plus a real-time counter on screen. • Fast, reliable validation logic using DANA’s available API or another proven technique. • Multithreading or async handling so tens of thousands of numbers process quickly. • Clean, minimal interface (console or lightweight GUI). • Full Python source code, requirements.txt, and a brief read-me covering setup and usage. Keep the scope tight: simple tool, accurate checks, quick turnaround. If you’ve worked with DANA or other Indonesian e-wallet APIs before, show me a sample so I can award promptly.