Resolve every rolled ItemDefinition before mutating the character or
creating the CombatReward row, so a missing definition can no longer
half-grant (XP/silver saved, reward row created, then throw). Also
make the immediate grant response and a later loadRewards replay
agree on item order by sorting both on itemDefinitionId instead of
roll/insertion order.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
