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/Core/Theme/AnimatedBackground.swift

@@ -28,7 +28,9 @@ struct AnimatedSportsBackground: View {
                 AnimatedSportsIcon(index: index, animate: animate)
             }
         }
+        .accessibilityHidden(true)
         .onAppear {
+            guard !Theme.Animation.prefersReducedMotion else { return }
             withAnimation(.easeInOut(duration: 5.0).repeatForever(autoreverses: true)) {
                 animate = true
             }
@@ -173,6 +175,8 @@ struct AnimatedSportsIcon: View {
     }
 
     private func triggerGlow() {
+        guard !Theme.Animation.prefersReducedMotion else { return }
+
         // Slow fade in
         withAnimation(.easeIn(duration: 0.8)) {
             glowOpacity = 1