feat: add WCAG AA accessibility app-wide, fix CloudKit container config, remove debug logs

- Add VoiceOver labels, hints, and element grouping across all 60+ views
- Add Reduce Motion support (Theme.Animation.prefersReducedMotion) to all animations
- Replace fixed font sizes with semantic Dynamic Type styles
- Hide decorative elements from VoiceOver with .accessibilityHidden(true)
- Add .minimumHitTarget() modifier ensuring 44pt touch targets
- Add AccessibilityAnnouncer utility for VoiceOver announcements
- Improve color contrast values in Theme.swift for WCAG AA compliance
- Extract CloudKitContainerConfig for explicit container identity
- Remove PostHog debug console log from AnalyticsManager

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

SportsTime/Features/Progress/Views/StadiumVisitHistoryView.swift

@@ -34,6 +34,7 @@ struct StadiumVisitHistoryView: View {
                     } label: {
                         Image(systemName: "plus")
                     }
+                    .accessibilityLabel("Add visit to this stadium")
                 }
             }
             .sheet(isPresented: $showingAddVisit) {
@@ -93,7 +94,7 @@ private struct EmptyVisitHistoryView: View {
     var body: some View {
         VStack(spacing: 16) {
             Image(systemName: "calendar.badge.plus")
-                .font(.system(size: 48))
+                .font(.largeTitle)
                 .foregroundStyle(.secondary)
 
             Text("No visits recorded")