fix(telemetry): use live ingest proxy #871

Job	Run time
Library — lint / test / build	3m 2s
Cockpit — representative capability smoke	1m 25s
examples/chat — aimock e2e	2m 4s
Website — lint / build	1m 49s
Cockpit — e2e	2m 5s
Cockpit — build all examples	5m 10s
Cockpit — secret-gated integration	1m 1s
Cockpit — deploy smoke dry-run	1m 13s
examples/chat — python smoke	1m 20s
Website — e2e	2m 3s
Cockpit — build / test	1m 31s
PostHog — dashboards-as-code drift check	1m 15s
Deploy → Vercel	0s
Production smoke	0s
	23m 58s

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