Swaps all four DateTime.UtcNow.Date same-day checks in PackController for
_calendar.ResetReady() — daily-single open, /pack/info daily-single gate,
FreePacks /pack/info visibility, FreePacks /pack/open quota. Removes the
TODO(daily-reset) comments; ToDto promoted from static to instance so it
can see _calendar.
Also fills in GameCalendarConfig.ShippedDefaults() (required by the
[ConfigSection] discovery in SVSimDbContext.EnsureSeedDataAsync — bootstrap
throws without it).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
New config-driven service that replaces JstPeriod. All timestamps are UTC;
one config value (GameCalendarConfig.DailyResetUtcHour, default 0 = midnight
UTC) drives both ResetReady checks and DayKey/WeekKey/MonthKey bucket keys.
Because both derive from the same MostRecentBoundary helper, they can never
disagree.
Prod parity is a config flip: set DailyResetUtcHour=17 in GameConfigs to get
the 02:00 JST boundary. No JST-flavored math anywhere in the code.
JstPeriod callsite migration + deletion follow in subsequent commits.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
