Ensure isCachable in checkCooldownAndFlushAfterPersisting

[KieranFYI]

When MODEL_CACHE_ENABLED is set to false, checkCooldownAndFlushAfterPersisting is still running logic which opens a cache connection.

[2024-02-25 04:34:58] local.ERROR: No connection could be made because the target machine actively refused it {"exception":"[object] (RedisException(code: 0): No connection could be made because the target machine actively refused it at \\vendor\\laravel\\framework\\src\\Illuminate\\Redis\\Connectors\\PhpRedisConnector.php:159) [stacktrace] #0 \\vendor\\laravel\\framework\\src\\Illuminate\\Redis\\Connectors\\PhpRedisConnector.php(159): Redis->connect('127.0.0.1', '6379', 0.0, NULL, 0, 0.0) #1 \\vendor\\laravel\\framework\\src\\Illuminate\\Redis\\Connectors\\PhpRedisConnector.php(88): Illuminate\\Redis\\Connectors\\PhpRedisConnector->establishConnection(Object(Redis), Array) #2 \\vendor\\laravel\\framework\\src\\Illuminate\\Support\\helpers.php(307): Illuminate\\Redis\\Connectors\\PhpRedisConnector->Illuminate\\Redis\\Connectors\\{closure}(Object(Redis)) #3 \\vendor\\laravel\\framework\\src\\Illuminate\\Redis\\Connectors\\PhpRedisConnector.php(129): tap(Object(Redis), Object(Closure)) #4 \\vendor\\laravel\\framework\\src\\Illuminate\\Redis\\Connectors\\PhpRedisConnector.php(34): Illuminate\\Redis\\Connectors\\PhpRedisConnector->createClient(Array) #5 \\vendor\\laravel\\framework\\src\\Illuminate\\Redis\\Connectors\\PhpRedisConnector.php(38): Illuminate\\Redis\\Connectors\\PhpRedisConnector->Illuminate\\Redis\\Connectors\\{closure}() #6 \\vendor\\laravel\\framework\\src\\Illuminate\\Redis\\RedisManager.php(112): Illuminate\\Redis\\Connectors\\PhpRedisConnector->connect(Array, Array) #7 \\vendor\\laravel\\framework\\src\\Illuminate\\Redis\\RedisManager.php(91): Illuminate\\Redis\\RedisManager->resolve('models') #8 \\vendor\\laravel\\framework\\src\\Illuminate\\Cache\\RedisStore.php(330): Illuminate\\Redis\\RedisManager->connection('models') #9 \\vendor\\laravel\\framework\\src\\Illuminate\\Cache\\RedisTagSet.php(43): Illuminate\\Cache\\RedisStore->connection() #10 \\vendor\\laravel\\framework\\src\\Illuminate\\Collections\\LazyCollection.php(789): Illuminate\\Cache\\RedisTagSet->Illuminate\\Cache\\{closure}() #11 [internal function]: Illuminate\\Support\\LazyCollection->Illuminate\\Support\\{closure}() #12 \\vendor\\laravel\\framework\\src\\Illuminate\\Collections\\LazyCollection.php(1297): Generator->valid() #13 \\vendor\\laravel\\framework\\src\\Illuminate\\Cache\\RedisTaggedCache.php(129): Illuminate\\Support\\LazyCollection->Illuminate\\Support\\{closure}() #14 \\vendor\\laravel\\framework\\src\\Illuminate\\Cache\\RedisTaggedCache.php(112): Illuminate\\Cache\\RedisTaggedCache->flushValues() #15 \\vendor\\genealabs\\laravel-model-caching\\src\\Traits\\Caching.php(115): Illuminate\\Cache\\RedisTaggedCache->flush() #16 \\vendor\\genealabs\\laravel-model-caching\\src\\Traits\\Caching.php(269): \\Models\\Permission->flushCache()