Method LoadPropsForManyAsync<TProps>(List<RedbObject<TProps>>, int?)

BULK Props loading with custom depth for nested RedbObject.
In OpenSource version, propsDepth is ignored — uses get_object_json with default depth.

public Task LoadPropsForManyAsync<TProps>(List<RedbObject<TProps>> objects, int? propsDepth) where TProps : class, new()