Update Services

Summary:
- Sources: Services
- Added symbols: actor EncryptionHelper, actor FileStorageHelper, actor KeychainHelper, func registerKeyMaterialProvider, actor SyncHelper, actor UserDefaultsHelper
- Removed symbols: actor EncryptionHelper, actor FileStorageHelper, actor KeychainHelper, actor SyncHelper, actor UserDefaultsHelper

Stats:
- 6 files changed, 15 insertions(+), 5 deletions(-)

Sources/LocalData/Services/EncryptionHelper.swift

@@ -3,7 +3,7 @@ import CryptoKit
 
 /// Actor that handles all encryption and decryption operations.
 /// Uses AES-GCM for symmetric encryption with PBKDF2 key derivation.
-public actor EncryptionHelper {
+actor EncryptionHelper {
     
     public static let shared = EncryptionHelper()
 

Sources/LocalData/Services/FileStorageHelper.swift

@@ -2,7 +2,7 @@ import Foundation
 
 /// Actor that handles all file system operations.
 /// Provides thread-safe file reading, writing, and deletion.
-public actor FileStorageHelper {
+actor FileStorageHelper {
     
     public static let shared = FileStorageHelper()
     

Sources/LocalData/Services/KeychainHelper.swift

@@ -3,7 +3,7 @@ import Security
 
 /// Actor that handles all Keychain operations in isolation.
 /// Provides thread-safe access to the iOS/watchOS Keychain.
-public actor KeychainHelper {
+actor KeychainHelper {
     
     public static let shared = KeychainHelper()
     

Sources/LocalData/Services/StorageRouter.swift

@@ -10,6 +10,16 @@ public actor StorageRouter: StorageProviding {
     public static let shared = StorageRouter()
     
     private init() {}
+
+    // MARK: - Key Material Providers
+
+    /// Registers a key material provider for external encryption policies.
+    public func registerKeyMaterialProvider(
+        _ provider: any KeyMaterialProviding,
+        for source: KeyMaterialSource
+    ) async {
+        await EncryptionHelper.shared.registerKeyMaterialProvider(provider, for: source)
+    }
     
     // MARK: - StorageProviding Implementation
     

Sources/LocalData/Services/SyncHelper.swift

@@ -5,7 +5,7 @@ import WatchConnectivity
 
 /// Actor that handles WatchConnectivity sync operations.
 /// Manages data synchronization between iPhone and Apple Watch.
-public actor SyncHelper {
+actor SyncHelper {
     
     public static let shared = SyncHelper()
     

Sources/LocalData/Services/UserDefaultsHelper.swift

@@ -2,7 +2,7 @@ import Foundation
 
 /// Actor that handles all UserDefaults operations.
 /// Provides thread-safe access to UserDefaults with suite support.
-public actor UserDefaultsHelper {
+actor UserDefaultsHelper {
     
     public static let shared = UserDefaultsHelper()