Implement Celica boss practice fights - #18

Thanks for the implementation. The core SimulateTrain pre-fight/NPC-group work looks salvageable, but this is not merge-ready yet:

1. GitHub currently reports the PR as DIRTY; please rebase and resolve conflicts against current master.
2. AccountModule.BuildNotifyArchiveLoginData emits every configured NPC variant with Killed = 1 on every login. That fabricates player archive history/completion. Please unlock the practice entries without synthesizing kills; preserve real persisted encounter history.
3. The generated SimulateTrain tables drop authoritative TimeId and ImpasseTimeId fields. TryApplyPreFight therefore allows time-gated bosses/impasse difficulties outside their configured windows. Please retain those fields and validate them through the activity schedule.
4. Period is not validated. An unsupported period currently succeeds and merely omits the period buff. Please reject periods not configured for the selected boss.

After those changes and conflict resolution, this should be re-reviewed.

Thanks — the previous blockers are fixed, the PR is now conflict-free, and both --simulate-train-compat-only and the full compatibility harness pass against current master.

One P1 blocker remains before merge: Resources/table/share/activity/ActivitySchedule.tsv adds SimulateTrain TimeIds 30305–36304 from a retail NotifyLogin capture and assigns EndTime=0. TryApplyPreFight consumes those rows at runtime, so historical rotating/Impasse stages become permanently open. A capture is a point-in-time oracle and cannot establish a permanent schedule.

Please remove those snapshot-derived rows or replace them with an authoritative schedule source. If no authoritative source exists, leave those gated modes unavailable rather than enabling them from captured timestamps. After that, this should be mergeable.