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Merge nightly into main: CONTRIBUTING.md, nmap -n reverse-DNS fix #55

Job	Run time
tests (ubuntu-latest, py3.8, unlocked)	1m 3s
NSE integration tests (root, -sU)	59s
tests (ubuntu-latest, py3.11)	1m 9s
bandit	9s
tests (ubuntu-latest, py3.10)	1m 17s
build artifacts	7s
tests (ubuntu-latest, py3.12)	1m 3s
workflow lint (actionlint + zizmor)	11s
ruff	7s
tests (ubuntu-latest, py3.13)	1m 6s
tests (macos-latest, py3.12)	47s
tests (ubuntu-latest, py3.9, unlocked)	1m 2s
tag release	6s
	9m 6s