feat(home-dialog): IGlobalsRepository.GetActiveHomeDialogsAsync

Window is [begin, end) — exclusive upper bound. Ordered priority-DESC
then Id-ASC so the controller can break on the first match.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

SVSim.Database/Repositories/Globals/IGlobalsRepository.cs

@@ -21,6 +21,7 @@ public interface IGlobalsRepository
     Task<List<BattlePassLevelEntry>> GetBattlePassLevels();
     Task<List<DailyLoginBonusEntry>> GetDailyLoginBonus();
     Task<List<BannerEntry>> GetBanners();
+    Task<IReadOnlyList<HomeDialogEntry>> GetActiveHomeDialogsAsync(DateTime nowUtc);
     Task<ColosseumConfig?> GetCurrentColosseum();
     Task<SealedConfig?> GetCurrentSealedSeason();
     Task<MasterPointRankingPeriodEntry?> GetCurrentMasterPointPeriod();