fix(cnb): skip local email cache and add safe email/state cache clearing

(cherry picked from commit 0e7f589df58240badc1d2340e9856882aa075b63)

lib/features/thread/data/datasource_impl/local_thread_datasource_impl.dart

@@ -133,12 +133,9 @@ class LocalThreadDataSourceImpl extends ThreadDataSource {
   }
 
   @override
-  Future<void> clearEmailCacheAndStateCache(AccountId accountId, Session session) {
+  Future<void> clearEmailCacheAndStateCache() {
     return Future.sync(() async {
-      return await _cachingManager.clearAllEmailAndStateCache(
-        accountId: accountId,
-        userName: session.username,
-      );
+      return await _cachingManager.clearAllEmailAndStateCache();
     }).catchError(_exceptionThrower.throwException);
   }
 }

lib/features/thread/data/datasource_impl/thread_datasource_impl.dart

@@ -142,7 +142,7 @@ class ThreadDataSourceImpl extends ThreadDataSource {
   }
 
   @override
-  Future<void> clearEmailCacheAndStateCache(AccountId accountId, Session session) {
+  Future<void> clearEmailCacheAndStateCache() {
     throw UnimplementedError();
   }
 }