Add the colour palette: white-shade filter and palette extraction

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MIL-001 tasks 1 to 6.

- Pin the toolchain and tool configuration in pyproject.toml: Python 3.13,
  colorgram.py 1.2.0, and ruff, mypy (strict) and pytest as dev tools.
- Add is_white_shade and remove_white_shades (threshold 240) with tests that
  pin the boundary at 239 and 240.
- Add extract_palette, which reads the reference image with colorgram and drops
  white shades, with tests on synthetic images and on the reference image.
- Add the reference image assets/20260524_132700.jpg and a note on it.
- Record the code review against QC-PY-001 as RC-005 (verdict Go).

Closes #1
Closes #2
Closes #3
Closes #4
Closes #5
Closes #6

Task: MIL-001#1
Task: MIL-001#2
Task: MIL-001#3
Task: MIL-001#4
Task: MIL-001#5
Task: MIL-001#6

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Tirsvad

2026-10-07 23:49:38 +08:00

parent b823d1f405

commit b7119ef907

7 changed files with 295 additions and 1 deletions

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assets/20260524_132700.jpg

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