fix: 10 audit fixes — memory safety, performance, accessibility, architecture

- Add a11y label to ProgressMapView reset button and progress bar values
- Fix CADisplayLink retain cycle in ItineraryTableViewController via deinit
- Add [weak self] to PhotoGalleryViewModel Task closure
- Add @MainActor to TripWizardViewModel, remove manual MainActor.run hop
- Fix O(n²) rank lookup in PollDetailView/DebugPollPreviewView with enumerated()
- Cache itinerarySections via ItinerarySectionBuilder static extraction + @State
- Convert CanonicalSyncService/BootstrapService from actor to @MainActor final class
- Add .accessibilityHidden(true) to RegionMapSelector Map to prevent duplicate VoiceOver

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

SportsTime/Features/Settings/DebugPollPreviewView.swift

@@ -189,9 +189,9 @@ struct DebugPollPreviewView: View {
             }
 
             VStack(spacing: Theme.Spacing.sm) {
-                ForEach(results.tripScores, id: \.tripIndex) { item in
+                ForEach(Array(results.tripScores.enumerated()), id: \.element.tripIndex) { index, item in
                     let trip = results.poll.tripSnapshots[item.tripIndex]
-                    let rank = results.tripScores.firstIndex { $0.tripIndex == item.tripIndex }! + 1
+                    let rank = index + 1
                     DebugResultRow(
                         rank: rank,
                         tripName: trip.displayName,