fix: codebase audit fixes — safety, accessibility, and production hygiene

Address 16 issues from external audit:
- Move StoreKit transaction listener ownership to StoreManager singleton with proper deinit
- Remove noisy VoiceOver announcements, add missing accessibility on StatPill and BootstrapLoadingView
- Replace String @retroactive Identifiable with IdentifiableShareCode wrapper
- Add crash guard in AchievementEngine getContributingVisitIds + cache stadium lookups
- Pre-compute GamesHistoryViewModel filtered properties to avoid redundant SwiftUI recomputation
- Remove force-unwraps in ProgressMapView with safe guard-let fallback
- Add diff-based update gating in ItineraryTableViewWrapper to prevent unnecessary reloads
- Replace deprecated UIScreen.main with UIWindowScene lookup
- Add deinit task cancellation in ScheduleViewModel and SuggestedTripsGenerator
- Wrap ~234 unguarded print() calls across 27 files in #if DEBUG

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

SportsTime/Planning/Engine/ScenarioPlanner.swift

@@ -43,6 +43,7 @@ enum ScenarioPlannerFactory {
     ///   - Both start and end locations → ScenarioCPlanner
     ///   - Otherwise → ScenarioAPlanner
     static func planner(for request: PlanningRequest) -> ScenarioPlanner {
+        #if DEBUG
         print("🔍 ScenarioPlannerFactory: Selecting planner...")
         print("   - planningMode: \(request.preferences.planningMode)")
         print("   - selectedTeamIds.count: \(request.preferences.selectedTeamIds.count)")
@@ -50,11 +51,14 @@ enum ScenarioPlannerFactory {
         print("   - selectedGames.count: \(request.selectedGames.count)")
         print("   - startLocation: \(request.startLocation?.name ?? "nil")")
         print("   - endLocation: \(request.endLocation?.name ?? "nil")")
+        #endif
 
         // Scenario E: Team-First mode - user selects teams, finds optimal trip windows
         if request.preferences.planningMode == .teamFirst &&
            request.preferences.selectedTeamIds.count >= 2 {
+            #if DEBUG
             print("🔍 ScenarioPlannerFactory: → ScenarioEPlanner (team-first)")
+            #endif
             return ScenarioEPlanner()
         }
 
@@ -62,30 +66,40 @@ enum ScenarioPlannerFactory {
         if request.preferences.planningMode == .teamFirst &&
            request.preferences.selectedTeamIds.count == 1 {
             // Single team in teamFirst mode → treat as follow-team
+            #if DEBUG
             print("🔍 ScenarioPlannerFactory: → ScenarioDPlanner (team-first single team)")
+            #endif
             return ScenarioDPlanner()
         }
 
         // Scenario D: User wants to follow a specific team
         if request.preferences.followTeamId != nil {
+            #if DEBUG
             print("🔍 ScenarioPlannerFactory: → ScenarioDPlanner (follow team)")
+            #endif
             return ScenarioDPlanner()
         }
 
         // Scenario B: User selected specific games
         if !request.selectedGames.isEmpty {
+            #if DEBUG
             print("🔍 ScenarioPlannerFactory: → ScenarioBPlanner (selected games)")
+            #endif
             return ScenarioBPlanner()
         }
 
         // Scenario C: User specified start and end locations
         if request.startLocation != nil && request.endLocation != nil {
+            #if DEBUG
             print("🔍 ScenarioPlannerFactory: → ScenarioCPlanner (start/end locations)")
+            #endif
             return ScenarioCPlanner()
         }
 
         // Scenario A: Date range only (default)
+        #if DEBUG
         print("🔍 ScenarioPlannerFactory: → ScenarioAPlanner (default/date range)")
+        #endif
         return ScenarioAPlanner()
     }