fix: Fix async cache

[cbornet]

• Replace the sync __contains__ by the async contains() in AsyncBaseCacheService
• Refactor ChatService
• Fix ChatService to call CacheService blocking methods in threads
• Fix SocketService to await on result when the cache is async.

[cbornet]

Note: as all the usages of the cache_service are done in coroutines, maybe we could have CacheServiceFactory return only AsyncBaseCacheService (making memory setting return AsyncInMemoryCache) ?

[ogabrielluiz]

LGTM