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Apply ruff formatting to context-window changes #183

Job	Run time
Ruff (lint + format)	32s
Build wheel, install & CLI smoke test	21s
Pyright	26s
Tests (py3.12)	1m 14s
Tests (py3.13)	1m 12s
pip-audit (dependency CVEs)	19s
Tests (py3.11)	1m 10s
	5m 14s