Merge feature branch into main #98

Job	Run time
typecheck (mypy --strict)	22s
lint (ruff)	17s
duplication	10s
security (pip-audit)	23s
test (Python 3.10)	47s
test (Python 3.12)	42s
test (Python 3.11)	44s
test (Python 3.13)	39s
test (Python 3.9)	50s
Hawk daemon contract snapshot	9s
build (sdist + wheel)	15s
	5m 18s

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