Titles are earned by reaching milestones (quests, bosses, gold, clicks,
adventurers, guild, prestige, transcendence, apotheosis, achievements,
longevity) and are permanent - never lost on prestige/transcendence/
apotheosis resets. 20 titles available at launch.
Also fixes a pre-existing P2034 write-conflict on the load backfill path
and the exactOptionalPropertyTypes violation in the quest failure handler.
