feat(c-interrupts): real interrupt() wiring via book_flight tool #991

Job	Run time
Cockpit — build all examples	5m 32s
Cockpit — deploy smoke dry-run	1m 4s
Cockpit — secret-gated integration	1m 16s
Cockpit — build / test	1m 32s
Library — lint / test / build	3m 33s
Cockpit — representative capability smoke	1m 15s
Website — lint / build	1m 32s
PostHog — dashboards-as-code drift check	1m 18s
Website — e2e	3m 9s
examples/chat — python smoke	1m 25s
examples/chat — e2e	2m 53s
Cockpit — e2e	2m 54s
Deploy → Vercel	-1s
Production smoke	0s
	27m 22s

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