best times only improve; achievement unlock announces on the transition
only, so popup/Steam subscribers cannot double-fire; statistics are
increase-only (IncrementStat took any int).
RelockAchievement is console-only and documented as not reaching Steam -
a Steam achievement cannot be un-earned, so the disagreement is
permanent and deliberate.
refactor: extract EventLog, composed by both aggregates now that the
duplication actually exists. 34 tests.
no LoseLife (ADR-0005). SettleDeath / SettleCompletion defer to the
Attempt's terminal outcome, so both are atomic and idempotent.
SettleCompletion branches on HasCleared itself - a Replay cannot bank
or move campaign position backwards (ADR-0003).
Campaign value object holds authored level order; ReachableLevels is
derived, replacing the stored UnlockedLevels. Coins.IsAtLeast driven
out by cross-scope affordability.
29 tests. CONTEXT.md: Campaign, Settle.
