fix: harden release preparation and publish handoff #117

Job	Run time
Locked OpenAI / Node.js 22.x	1m 0s
Pack the CI artifact	24s
Locked OpenAI / Node.js 24.x	1m 4s
Standalone repository check	1m 1s
Node.js 26 advisory	34s
GitHub Actions static validation	21s
Minimum OpenAI / Node.js 22	20s
Latest OpenAI 6.x canary / Node.js 24	0s
Verify the CI artifact round-trip	4s
	4m 48s

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