Cosmos DB client cross-partition ORDER BY queries fail

[ollym]

Full summary of what is wrong is here:
https://stackoverflow.com/questions/50240232/cosmos-db-rest-api-order-by-with-partitioning

Basically CosmosDB has some hacks that allow ORDER BY queries but it requires implementation within the SDK itself, otherwise you get this rather cryptic error message:

The provided cross partition query can not be directly served by the gateway. This is a first chance (internal) exception that all newer clients will know how to handle gracefully. This exception is traced, but unless you see it bubble up as an exception (which only happens on older SDK clients), then you can safely ignore this message.

[jdanyow]

@ollym I didn't try to implement these types of operations in @cfworker/cosmos because they would quickly make apps hit the Worker cpu/memory limits. Now that the workers unbound product exists it might be worth taking a look at what this would entail. I don't have the bandwidth to take something like this on at the moment.