CreateShardKeyForCosmos does not create sharded collection

Hello,
I think that the method GetCollection ->

Orleans.Providers.MongoDB/Orleans.Providers.MongoDB/StorageProviders/MongoGrainStorage.cs

Lines 193 to 200 in 84a3237

    
           database.RunCommand<BsonDocument>(new BsonDocument 
        
           { 
        
               ["key"] = new BsonDocument 
        
               { 
        
                   ["_id"] = "hashed" 
        
               }, 
        
               ["shardCollection"] = $"{database.DatabaseNamespace.DatabaseName}.{collectionName}" 
        
           });

is missing specification of shard key as for CosmsoDB as per the documentation / it has to be created differently for CosmosDB.

Creating a collection via command below creates the collection really sharded, at least according to Azure Monitor.

db.createCollection(<collectionName>, {
    "shardKey": "_id",
    "indexes": [{key: {_id: 1}}}]
});

Could be, not a CosmosDB user. PRs are welcome ;)

Great :) See PR #99

	database.RunCommand<BsonDocument>(new BsonDocument
	{
	["key"] = new BsonDocument
	{
	["_id"] = "hashed"
	},
	["shardCollection"] = $"{database.DatabaseNamespace.DatabaseName}.{collectionName}"
	});