- snapshots doubled the cache restore (25 to 52 s) and device-offline retries went from 3 to 10
- the AVD job boots the new AVD once and powers it off; retrace jobs cold-boot it as before
- the AVD job boots the new AVD once per GPU mode and saves a snapshot into the cache
- retrace jobs load their mode's snapshot, log whether it loaded, and skip SDK setup on a hit