test_moon_composite.py uses the existing repo sample frames
(21-07-00.jpg east frame with thin cloud cover + full_moon_closeup.jpg
as NASA render stand-in) to produce test_composite_out.jpg without
needing a live NASA API call or moon detection run.
Run: python3 test_moon_composite.py
https://claude.ai/code/session_01HkTxpNSTWtViZzxbrbKytR