TF-886 Store encryptionKey in Hive database

lib/features/caching/caching_manager.dart

@@ -3,6 +3,7 @@ import 'package:flutter/foundation.dart';
 import 'package:tmail_ui_user/features/caching/account_cache_client.dart';
 import 'package:tmail_ui_user/features/caching/authentication_info_cache_client.dart';
 import 'package:tmail_ui_user/features/caching/email_cache_client.dart';
+import 'package:tmail_ui_user/features/caching/encryption_key_cache_client.dart';
 import 'package:tmail_ui_user/features/caching/mailbox_cache_client.dart';
 import 'package:tmail_ui_user/features/caching/recent_search_cache_client.dart';
 import 'package:tmail_ui_user/features/caching/state_cache_client.dart';
@@ -16,6 +17,7 @@ class CachingManager {
   final RecentSearchCacheClient _recentSearchCacheClient;
   final TokenOidcCacheClient _tokenOidcCacheClient;
   final AccountCacheClient _accountCacheClient;
+  final EncryptionKeyCacheClient _encryptionKeyCacheClient;
   final AuthenticationInfoCacheClient _authenticationInfoCacheClient;
 
   CachingManager(
@@ -25,6 +27,7 @@ class CachingManager {
     this._recentSearchCacheClient,
     this._tokenOidcCacheClient,
     this._accountCacheClient,
+    this._encryptionKeyCacheClient,
     this._authenticationInfoCacheClient,
   );
 
@@ -37,6 +40,7 @@ class CachingManager {
         _recentSearchCacheClient.clearAllData(),
         _tokenOidcCacheClient.clearAllData(),
         _accountCacheClient.clearAllData(),
+        _encryptionKeyCacheClient.clearAllData(),
         _authenticationInfoCacheClient.clearAllData(),
       ]);
     } else {
@@ -47,6 +51,7 @@ class CachingManager {
         _recentSearchCacheClient.deleteBox(),
         _tokenOidcCacheClient.deleteBox(),
         _accountCacheClient.deleteBox(),
+        _encryptionKeyCacheClient.deleteBox(),
         _authenticationInfoCacheClient.deleteBox(),
       ]);
     }