The restore drill's red card says, in minutes, what failed, how old the newest snapshot is, and the one next step #2812

Part of the owner's #2667. Pull #2670 has this wording and real tests for it, so reuse its src/snapshot/verdict.ts change. Leave out its per-download deadline: main already scales the budget with size (#2773).

Done:

• [ ] the card reads like "The restore drill timed out restoring after about 10 minutes. The newest snapshot is 5 days old. Restore by hand as docs/RECOVERY.md Route 1 says; this clears when a drill passes."
• [ ] no raw or fractional milliseconds anywhere on the card
• [ ] test: a failed verdict of 596591.19 ms renders "about 10 minutes" and the snapshot's age in days. It fails on main

Files: src/snapshot/verdict.ts, its test.