fix: resolve specificStadium achievement ID mismatch

The Green Monster (Fenway) and Ivy League (Wrigley) achievements
weren't working because:
1. Symbolic IDs use lowercase sport (stadium_mlb_bos)
2. Sport enum uses uppercase raw values (MLB)
3. Visits store stadium UUIDs, not symbolic IDs

Added resolveSymbolicStadiumId() helper that:
- Uppercases the sport string before Sport(rawValue:)
- Looks up team by abbreviation and sport
- Returns the team's stadiumId as UUID string

Also fixed:
- getStadiumIdsForLeague returns UUID strings (not symbolic IDs)
- AchievementProgress.isEarned computed from progress OR stored record
- getStadiumIdsForDivision queries CanonicalTeam properly

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

SportsTime/Features/Progress/ViewModels/ProgressViewModel.swift

@@ -77,7 +77,8 @@ final class ProgressViewModel {
                         visitDate: visit.visitDate,
                         visitType: visit.visitType,
                         sport: selectedSport,
-                        matchup: visit.matchupDescription,
+                        homeTeamName: visit.homeTeamName,
+                        awayTeamName: visit.awayTeamName,
                         score: visit.finalScore,
                         photoCount: visit.photoMetadata?.count ?? 0,
                         notes: visit.notes
@@ -123,7 +124,8 @@ final class ProgressViewModel {
                     visitDate: visit.visitDate,
                     visitType: visit.visitType,
                     sport: sport,
-                    matchup: visit.matchupDescription,
+                    homeTeamName: visit.homeTeamName,
+                    awayTeamName: visit.awayTeamName,
                     score: visit.finalScore,
                     photoCount: visit.photoMetadata?.count ?? 0,
                     notes: visit.notes