Fix CI build failures

- Add missing `import UIKit` to AccessibilityContainer.swift
- Add Swift version check for @retroactive attribute (5.10+)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: RoyalPineapple

Sources/AccessibilitySnapshot/Parser/Swift/Classes/AccessibilityContainer.swift

@@ -1,5 +1,5 @@
 //
-//  Copyright 2025 
+//  Copyright 2025
 //
 //  Licensed under the Apache License, Version 2.0 (the "License");
 //  you may not use this file except in compliance with the License.
@@ -14,7 +14,7 @@
 //  limitations under the License.
 //
 
-
+import UIKit
 
 // MARK: - Container Visualization Types
 

Sources/AccessibilitySnapshot/Parser/Swift/Classes/AccessibilityHierarchy+Codable.swift

@@ -2,8 +2,16 @@ import UIKit
 
 // MARK: - UIKit Type Codable Extensions
 
-extension UIAccessibilityTraits: @retroactive Codable {
-    
+#if swift(>=5.10)
+extension UIAccessibilityTraits: @retroactive Codable {}
+extension UIAccessibilityContainerType: @retroactive Codable {}
+#else
+extension UIAccessibilityTraits: Codable {}
+extension UIAccessibilityContainerType: Codable {}
+#endif
+
+extension UIAccessibilityTraits {
+
     public init(from decoder: Decoder) throws {
         let container = try decoder.singleValueContainer()
         let rawValue = try container.decode(UInt64.self)
@@ -16,7 +24,7 @@ extension UIAccessibilityTraits: @retroactive Codable {
     }
 }
 
-extension UIAccessibilityContainerType: @retroactive Codable {
+extension UIAccessibilityContainerType {
 
     public init(from decoder: Decoder) throws {
         let container = try decoder.singleValueContainer()