feat(a2ui): v0.9 action envelope and sendDataModel transport (#101) #329

Job	Run time
Cockpit — build all examples	4m 59s
Cockpit — secret-gated integration	1m 13s
Cockpit — representative capability smoke	1m 10s
Library — lint / test / build	1m 24s
Website — lint / build	1m 44s
Cockpit — e2e	2m 5s
Cockpit — deploy smoke dry-run	1m 8s
Chat Agent — smoke	1m 17s
Website — e2e	2m 4s
Cockpit — build / test	1m 31s
Deploy → Vercel	7m 47s
Production smoke	2m 54s
	29m 16s

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