Saving makes the game of the asked player freeze for seconds. Joining now asks
for a fresh save only if the stored one is older than JoinSaveMaxAgeMinutes (15)
and something changed - otherwise the stored save plus the world state; regular
saves every 30 minutes (old untouched default 10 is migrated once) and marked
not urgent, so the game can wait for a calm moment (60 s deadline). 3 new tests (168).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
MrMahoandClaude Opus 5.5
6e2ef3b570