Show lane lifecycle metrics across dashboard surfaces

[yvette-carlisle]

Summary

• aggregate lifecycle metrics across lane attempts by phase for the operator state surfaces
• show lifecycle totals and phase breakdowns in the web dashboard and macOS account panel
• keep the dashboard mock and app bridge on the shared WebSocket control-plane path
• document the dashboard/app mock-server contract

Validation

• cargo make check
• swift test in apps/decodex-app
• git diff --check