- textbbox was measured at the patch position and that position was then
subtracted again, so every number was drawn inside patch 0. Measure at the
origin and subtract only the glyph offset.
- Fall back to DejaVu Sans / Helvetica, then Pillow's scalable default font,
so font_size works where Arial is not installed.
- Add regression tests for label placement and font size.
- Add the Linux/Windows CPU test workflow that the README already describes.
- Add .gitignore for __pycache__, bump version to 1.2.1, update README and
VALIDATION.md.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01K5PqyHqy9udCb9y3WWmeTx
