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/Trip/Views/ItineraryTableViewController.swift

@@ -511,6 +511,13 @@ final class ItineraryTableViewController: UITableViewController {
         ItineraryReorderingLogic.travelRow(in: flatItems, forDay: day)
     }
     
+    deinit {
+        #if DEBUG
+        displayLink?.invalidate()
+        displayLink = nil
+        #endif
+    }
+
     // MARK: - Marketing Video Auto-Scroll
 
     #if DEBUG