feat: complete delta sync implementation - add allGames, update callers

- Add allRichGames method to DataProvider
- Update TripCreationViewModel.loadGamesForBrowsing to use allGames (removes 90-day limit)
- Update MockCloudKitService sync methods to use new delta sync signatures
- Update MockAppDataProvider with renamed methods and new allGames/allRichGames
- Fix all callers: ScheduleViewModel, TripCreationViewModel, SuggestedTripsGenerator, GameMatcher
- Update CLAUDE.md documentation with new method names

This completes the delta sync implementation:
- CloudKit sync now uses modificationDate for proper delta sync
- First sync fetches ALL data, subsequent syncs only fetch modified records
- "By Games" mode now shows all available games (not just 90 days)
- All data types (stadiums, teams, games) use consistent delta sync pattern

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

SportsTime/Features/Schedule/ViewModels/ScheduleViewModel.swift

@@ -95,7 +95,7 @@ final class ScheduleViewModel {
                 return
             }
 
-            games = try await dataProvider.fetchRichGames(
+            games = try await dataProvider.filterRichGames(
                 sports: selectedSports,
                 startDate: startDate,
                 endDate: endDate