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/Trip/ViewModels/TripCreationViewModel.swift

@@ -260,8 +260,8 @@ final class TripCreationViewModel {
                 stadiums[stadium.id] = stadium
             }
 
-            // Fetch games
-            games = try await dataProvider.fetchGames(
+            // Filter games within date range
+            games = try await dataProvider.filterGames(
                 sports: selectedSports,
                 startDate: startDate,
                 endDate: endDate
@@ -488,13 +488,8 @@ final class TripCreationViewModel {
                 stadiums[stadium.id] = stadium
             }
 
-            // Fetch games for next 90 days for browsing
-            let browseEndDate = Calendar.current.date(byAdding: .day, value: 90, to: Date()) ?? endDate
-            games = try await dataProvider.fetchGames(
-                sports: selectedSports,
-                startDate: Date(),
-                endDate: browseEndDate
-            )
+            // Fetch all games for browsing (no date filter)
+            games = try await dataProvider.allGames(for: selectedSports)
 
             // Build rich games for display
             availableGames = games.compactMap { game -> RichGame? in