Feature Request: Profile API should show node details as well as shard details

Describe the feature:

Currently the Profile API breaks down the timing information by shard. It would be useful if it could also list which node the shard is on such that one might be able to infer whether performance is a node-level issue. This is particularly useful where a shard might have a big replica count and its difficult to tell which shard copy on which node was the one that was hit by this search.