Implement Celica boss practice fights

[VAGUE000]

Summary

Implements Celica boss practice support.

• Unlocks configured bosses in Celica’s Class
• Adds SimulateTrainInfo pre-fight support
• Builds the official boss NpcGroupList with difficulty, period, attack, and HP modifiers
• Adds correct settlement data
• Uses generated client-derived SimulateTrain tables
• Adds compatibility coverage

Fixes

• Celica boss menu now appears
• Bosses no longer die immediately
• Correct boss and difficulty appear after combat

Verification

dotnet run --project AscNet.Test/AscNet.Test.csproj -- --simulate-train-compat-only
dotnet build AscNet/AscNet.csproj --no-restore

[reiserFSs]

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.