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/Trip/Views/Wizard/Steps/MustStopsStep.swift

@@ -25,6 +25,7 @@ struct MustStopsStep: View {
                         HStack {
                             Image(systemName: "mappin.circle.fill")
                                 .foregroundStyle(Theme.warmOrange)
+                                .accessibilityHidden(true)
 
                             Text(location.name)
                                 .font(.subheadline)
@@ -38,6 +39,8 @@ struct MustStopsStep: View {
                                 Image(systemName: "xmark.circle.fill")
                                     .foregroundStyle(Theme.textMuted(colorScheme))
                             }
+                            .minimumHitTarget()
+                            .accessibilityLabel("Remove location")
                         }
                         .padding(Theme.Spacing.sm)
                         .background(Theme.cardBackgroundElevated(colorScheme))
@@ -56,6 +59,7 @@ struct MustStopsStep: View {
                 .font(.subheadline)
                 .foregroundStyle(Theme.warmOrange)
             }
+            .accessibilityLabel("Add must-see location")
 
             Text("Skip this step if you don't have specific cities in mind")
                 .font(.caption)