Array key size should be based total length of expanded composite items to compare against max_array_seckey_size

Currently the unexpanded key size is being compared with max_array_seckey_size. But the total key size after exploding the array (along with composition) should be used for size limiting.

Example: if array is created on (ALL scores, name), and the incoming key is [ [1, 2, 3], ABC], then total size of [1, ABC], [2, ABC], [3, ABC] should be used for comparison against max_array_seckey_size.