Indicates that entries of this class will be stored in-memory in a packed binary format. Binary storage reduces
memory consumption, but requires unpacking when accessing the data at the server side (e.g. matching or aggregation).
By default, non-indexed properties are stored in binary format, whereas indexed properties are stored in object format,
providing a balanced tradeoff between performance and memory footprint. You can override that default per property
using the SpacePropertyStorage annotation.