fix: pre-v0.6.0 release hardening#126

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buffcode wants to merge 11 commits intomasterfrom

fix/pre-v6-release

Commits on Apr 22, 2026

fix: move cache and singleton state onto class instance
buffcode
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ci: verify published artifact with npm pack, publint, and attw

buffcode
and
claude
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perf: rewrite createPacket with Buffer.writeBigUInt64BE
buffcode
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fix: narrow NTP reply field validation in acceptResponse
buffcode
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fix: register message listener before send to avoid missed-reply race
buffcode
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fix: increment retry when round yields no new samples
buffcode
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fix: harden socket and listener cleanup on error paths
buffcode
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fix: lock down public API with explicit exports and frozen defaults
buffcode
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test: add unit tests for protocol logic and recent fixes
buffcode
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chore: prefix repository.url with git+ for publint compliance
buffcode
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ci: key node_modules cache on package.json instead of gitignored yarn.lock
buffcode
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