Tests

Lazy-load chat histories, fast list summaries, and mtime disk cache (… #185

Job	Run time
Secret scan (gitleaks)	5s
Typecheck (mypy)	17s
Lock file freshness	9s
Unit tests (windows-latest / Python 3.10)	1m 12s
Unit tests (ubuntu-latest / Python 3.11)	20s
Unit tests (windows-latest / Python 3.12)	1m 50s
Unit tests (windows-latest / Python 3.11)	1m 3s
Unit tests (ubuntu-latest / Python 3.12)	24s
Unit tests (ubuntu-latest / Python 3.13)	29s
Unit tests (ubuntu-latest / Python 3.10)	35s
Unit tests (windows-latest / Python 3.13)	1m 1s
Unit tests (macos-latest / Python 3.10)	32s
Unit tests (macos-latest / Python 3.13)	16s
Unit tests (macos-latest / Python 3.11)	17s
Unit tests (macos-latest / Python 3.12)	23s
	8m 53s

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