feat: add approval-gated npm release workflows #18

Job	Run time
Package compatibility / Node 20	27s
Package compatibility / Node 24	24s
Prepare verification matrix	9s
Policy surface	3s
Verify / architecture	12s
Verify / lint-changed	10s
Verify / audit	9s
Verify / build-webui	6s
Verify / test	22s
Verify / typecheck	31s
Verify / lint	11s
Gate	2s
	2m 46s

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